The United States of America (USA or U.S.A.), commonly known as the United States (US or U.S.) or America, is a country primarily located in North America. It is a federation of 50 states, which also includes its federal capital district of Washington, D.C., and 326 Indian reservations. The 48 contiguous states border Canada to the north and Mexico to the south. The State of Alaska is non-contiguous and lies to the northwest, while the State of Hawaii is an archipelago in the Pacific Ocean. Outside the union of states, the U.S. also asserts sovereignty over five major unincorporated island territories and various uninhabited islands. The country has the world's third-largest land area, second-largest exclusive economic zone, and third-largest population, exceeding 334 million.

Paleo-Indians migrated across the Bering land bridge more than 12,000 years ago, and went on to form various civilizations and societies. British colonization led to the first settlement of the Thirteen Colonies in Virginia in 1607. Clashes with the British Crown over taxation and political representation sparked the American Revolution, with the Second Continental Congress formally declaring independence on July 4, 1776. Following its victory in the 1775–1783 Revolutionary War, the country continued to expand across North America. As more states were admitted, sectional division over slavery led to the secession of the Confederate States of America, which fought the remaining states of the Union during the 1861–1865 American Civil War. With the Union's victory and preservation, slavery was abolished nationally. By 1890, the United States had established itself as a great power. After Japan's attack on Pearl Harbor in December 1941, the U.S. entered World War II. The aftermath of the war left the U.S. and the Soviet Union as the world's two superpowers and led to the Cold War, during which both countries engaged in a struggle for ideological dominance and international influence. Following the Soviet Union's collapse and the end of the Cold War in 1991, the U.S. emerged as the world's sole superpower.

The U.S. national government is a presidential constitutional republic and liberal democracy with three separate branches: legislative, executive, and judicial. It has a bicameral national legislature composed of the House of Representatives, a lower house based on population; and the Senate, an upper house based on equal representation for each state. Substantial autonomy is given to states and several territories, with a political culture promoting liberty, equality, individualism, personal autonomy, and limited government. (Full article...)

India, officially the Republic of India (ISO: Bhārat Gaṇarājya), is a country in South Asia. It is the seventh-largest country by area; the most populous country as of June 2023; and from the time of its independence in 1947, the world's most populous democracy. Bounded by the Indian Ocean on the south, the Arabian Sea on the southwest, and the Bay of Bengal on the southeast, it shares land borders with Pakistan to the west; China, Nepal, and Bhutan to the north; and Bangladesh and Myanmar to the east. In the Indian Ocean, India is in the vicinity of Sri Lanka and the Maldives; its Andaman and Nicobar Islands share a maritime border with Thailand, Myanmar, and Indonesia.

Modern humans arrived on the Indian subcontinent from Africa no later than 55,000 years ago.
Their long occupation, initially in varying forms of isolation as hunter-gatherers, has made the region highly diverse, second only to Africa in human genetic diversity. Settled life emerged on the subcontinent in the western margins of the Indus river basin 9,000 years ago, evolving gradually into the Indus Valley Civilisation of the third millennium BCE.
By 1200 BCE, an archaic form of Sanskrit, an Indo-European language, had diffused into India from the northwest. Its evidence today is found in the hymns of the Rigveda. Preserved by an oral tradition that was resolutely vigilant, the Rigveda records the dawning of Hinduism in India. The Dravidian languages of India were supplanted in the northern and western regions.
By 400 BCE, stratification and exclusion by caste had emerged within Hinduism,
and Buddhism and Jainism had arisen, proclaiming social orders unlinked to heredity.
Early political consolidations gave rise to the loose-knit Maurya and Gupta Empires based in the Ganges Basin.
Their collective era was suffused with wide-ranging creativity, but also marked by the declining status of women, and the incorporation of untouchability into an organised system of belief. In South India, the Middle kingdoms exported Dravidian-languages scripts and religious cultures to the kingdoms of Southeast Asia.

In the early medieval era, Christianity, Islam, Judaism, and Zoroastrianism became established on India's southern and western coasts.
Muslim armies from Central Asia intermittently overran India's northern plains,
eventually founding the Delhi Sultanate, and drawing northern India into the cosmopolitan networks of medieval Islam.
In the 15th century, the Vijayanagara Empire created a long-lasting composite Hindu culture in south India.
In the Punjab, Sikhism emerged, rejecting institutionalised religion.
The Mughal Empire, in 1526, ushered in two centuries of relative peace,
leaving a legacy of luminous architecture.
Gradually expanding rule of the British East India Company followed, turning India into a colonial economy, but also consolidating its sovereignty. British Crown rule began in 1858. The rights promised to Indians were granted slowly, but technological changes were introduced, and modern ideas of education and the public life took root. A pioneering and influential nationalist movement emerged, which was noted for nonviolent resistance and became the major factor in ending British rule. In 1947 the British Indian Empire was partitioned into two independent dominions, a Hindu-majority Dominion of India and a Muslim-majority Dominion of Pakistan, amid large-scale loss of life and an unprecedented migration. (Full article...)

Georgia (Georgian: საქართველო, romanized: sakartvelo, IPA: [sakʰartʰʷelo] ^ⓘ) is a transcontinental country in Eastern Europe and West Asia. It is part of the Caucasus region, bounded by the Black Sea to the west, Russia to the north and northeast, Turkey to the southwest, Armenia to the south, and Azerbaijan to the southeast. Georgia covers an area of 69,700 square kilometres (26,900 sq mi). It has a population of 3.7 million, of which over a third live in the capital and largest city, Tbilisi. Georgians, who are native to the region, constitute a majority of the country's population and are its titular nation.

Georgia has been inhabited since prehistory, hosting the world's earliest known sites of winemaking, gold mining, and textiles. The classical era saw the emergence of several kingdoms, such as Colchis and Iberia, that formed the nucleus of the modern Georgian state. In the early fourth century, Georgians officially adopted Christianity, which contributed to the unification into the Kingdom of Georgia. Georgia reached its Golden Age during the High Middle Ages under the reigns of King David IV and Queen Tamar. Beginning in the 15th century, the kingdom declined and disintegrated under pressure from various regional powers, including the Mongols, the Ottoman Empire, and Persia, before being gradually annexed into the Russian Empire starting in 1801.

After the Russian Revolution in 1917, Georgia briefly emerged as an independent republic under German protection, but was invaded and annexed by the Soviet Union in 1922, becoming one of its constituent republics. In the 1980s, an independence movement grew quickly, leading to Georgia's secession from the Soviet Union in April 1991. For much of the subsequent decade, the country endured economic crises, political instability, and secessionist wars in Abkhazia and South Ossetia. Following the peaceful Rose Revolution in 2003, Georgia strongly pursued a pro-Western foreign policy, introducing a series of democratic and economic reforms aimed at integration into the European Union and NATO. This Western orientation led to worsening relations with Russia, culminating in the Russo-Georgian War of 2008 and continued Russian occupation of parts of Georgia. (Full article...)

The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Northwestern Europe, off the coast of the continental mainland. It comprises England, Scotland, Wales, and Northern Ireland. The UK includes the island of Great Britain, the north-eastern part of the island of Ireland, and most of the smaller islands within the British Isles. Northern Ireland shares a land border with the Republic of Ireland; otherwise, the United Kingdom is surrounded by the Atlantic Ocean, the North Sea, the English Channel, the Celtic Sea, and the Irish Sea. The total area of the United Kingdom is 94,354 square miles (244,376 km²), with an estimated population of nearly 67.6 million people in 2022.

In 1707, the Kingdom of England (which included Wales) and the Kingdom of Scotland united under the Treaty of Union to create the Kingdom of Great Britain. The Acts of Union 1800 incorporated the Kingdom of Ireland to create the United Kingdom of Great Britain and Ireland in 1801. Most of Ireland seceded from the UK in 1922 as the Irish Free State, and the Royal and Parliamentary Titles Act 1927 created the present name.

The UK became the first industrialised country and was the world's foremost power for the majority of the 19th and early 20th centuries, particularly during the "Pax Britannica" between 1815 and 1914. At its height in the 1920s, the British Empire encompassed almost a quarter of the world's landmass and population, and was the largest empire in history. However, its involvement in the First World War and the Second World War damaged Britain's economic power and a global wave of decolonisation led to the independence of most British colonies. British influence can be observed in the legal and political systems of many of its former colonies, and British culture remains globally influential, particularly in language, literature, music and sport. English is the world's most widely spoken language and the third-most spoken native language. (Full article...)

Albania (/ælˈbeɪniə, ɔːl-/ ^ⓘ a(w)l-BAY-nee-ə; Albanian: Shqipëri or Shqipëria), officially the Republic of Albania (Albanian: Republika e Shqipërisë), is a country in Southeast Europe. It is in the Balkans, on the Adriatic and Ionian Seas within the Mediterranean Sea, and shares land borders with Montenegro to the northwest, Kosovo to the northeast, North Macedonia to the east and Greece to the south. With an area of 28,748 km² (11,100 sq mi), it has a varied range of climatic, geological, hydrological and morphological conditions. Albania's landscapes range from rugged snow-capped mountains in the Albanian Alps and the Korab, Skanderbeg, Pindus and Ceraunian Mountains, to fertile lowland plains extending from the Adriatic and Ionian seacoasts. Tirana is the capital and largest city in the country, followed by Durrës, Vlorë, and Shkodër.

In ancient times, the Illyrians inhabited northern and central regions of Albania, whilst Epirotes inhabited the south. Several important ancient Greek colonies were also established on the coast. The Illyrian kingdom centered in what is now Albania was the dominant power before the Rise of Macedon. In the 2nd century BC, the Roman Republic annexed the region, and after the division of the Roman Empire it became part of Byzantium. The first known Albanian autonomous principality, Arbanon, was established in the 12th century. The Kingdom of Albania, Principality of Albania and Albania Veneta were formed between the 13th and 15th centuries in different parts of the country, alongside other Albanian principalities and political entities. In the late 15th century, Albania became part of the Ottoman Empire. In 1912, the modern Albanian state declared independence. In 1939, Italy invaded the Kingdom of Albania, which became Greater Albania, and then a protectorate of Nazi Germany during World War II. After the war, the People's Socialist Republic of Albania was formed, which lasted until the Revolutions of 1991 concluded with the fall of communism in Albania and eventually the establishment of the current Republic of Albania.

Since its independence in 1912, Albania has undergone a diverse political evolution, transitioning from a monarchy to a communist regime before becoming a sovereign parliamentary constitutional republic. Governed by a constitution prioritizing the separation of powers, the country's political structure includes a parliament, a ceremonial president, a functional prime minister and a hierarchy of courts. Albania is a developing country with an upper-middle income economy driven by the service sector, with manufacturing and tourism also playing significant roles. After the dissolution of its communist system the country shifted from centralized planning to an open market economy. Albanian citizens benefit from universal health care access and free primary and secondary education. (Full article...)

The Czech Republic, also known as Czechia, is a landlocked country in Central Europe. Historically known as Bohemia, it is bordered by Austria to the south, Germany to the west, Poland to the northeast, and Slovakia to the southeast. The Czech Republic has a hilly landscape that covers an area of 78,871 square kilometers (30,452 sq mi) with a mostly temperate continental and oceanic climate. The capital and largest city is Prague; other major cities and urban areas include Brno, Ostrava, Plzeň and Liberec.

The Duchy of Bohemia was founded in the late 9th century under Great Moravia. It was formally recognized as an Imperial State of the Holy Roman Empire in 1002 and became a kingdom in 1198. Following the Battle of Mohács in 1526, all of the Crown lands of Bohemia were gradually integrated into the Habsburg monarchy. Nearly a hundred years later, the Protestant Bohemian Revolt led to the Thirty Years' War. After the Battle of White Mountain, the Habsburgs consolidated their rule. With the dissolution of the Holy Roman Empire in 1806, the Crown lands became part of the Austrian Empire.

In the 19th century, the Czech lands became more industrialized, and in 1918 most of it became part of the First Czechoslovak Republic following the collapse of Austria-Hungary after World War I. Czechoslovakia was the only country in Central and Eastern Europe to remain a parliamentary democracy during the entirety of the interwar period. After the Munich Agreement in 1938, Nazi Germany systematically took control over the Czech lands. Czechoslovakia was restored in 1945 and three years later became an Eastern Bloc communist state following a coup d'état in 1948. Attempts to liberalize the government and economy were suppressed by a Soviet-led invasion of the country during the Prague Spring in 1968. In November 1989, the Velvet Revolution ended communist rule in the country and restored democracy. On 31 December 1992, Czechoslovakia was peacefully dissolved, with its constituent states becoming the independent states of the Czech Republic and Slovakia. (Full article...)

Russia, or the Russian Federation, is a country spanning Eastern Europe and North Asia. It is the largest country in the world by area, extending across eleven time zones and sharing land borders with fourteen countries. It is the world's ninth-most populous country and Europe's most populous country. Russia is a highly urbanised country including 16 population centres with over a million inhabitants. Its capital as well as its largest city is Moscow. Saint Petersburg is Russia's second-largest city and its cultural capital.

The East Slavs emerged as a recognised group in Europe between the 3rd and 8th centuries CE. The first East Slavic state, Kievan Rus', arose in the 9th century, and in 988, it adopted Orthodox Christianity from the Byzantine Empire. Rus' ultimately disintegrated, with the Grand Duchy of Moscow growing to become the Tsardom of Russia. By the early 18th century, Russia had vastly expanded through conquest, annexation, and the efforts of Russian explorers, developing into the Russian Empire, which remains the third-largest empire in history. However, with the Russian Revolution in 1917, Russia's monarchic rule was abolished and eventually replaced by the Russian SFSR—the world's first constitutionally socialist state. Following the Russian Civil War, the Russian SFSR established the Soviet Union with three other Soviet republics, within which it was the largest and principal constituent. At the expense of millions of lives, the Soviet Union underwent rapid industrialisation in the 1930s and later played a decisive role for the Allies in World War II by leading large-scale efforts on the Eastern Front. With the onset of the Cold War, it competed with the United States for ideological dominance and international influence. The Soviet era of the 20th century saw some of the most significant Russian technological achievements, including the first human-made satellite and the first human expedition into outer space.

In 1991, the Russian SFSR emerged from the dissolution of the Soviet Union as the independent Russian Federation. A new constitution was adopted, which established a federal semi-presidential system. Since the turn of the century, Russia's political system has been dominated by Vladimir Putin, under whom the country has experienced democratic backsliding and a shift towards authoritarianism. Russia has been militarily involved in a number of conflicts in former Soviet states and other countries, including its war with Georgia in 2008 and annexation of Crimea in 2014 from neighbouring Ukraine, followed by the further annexation of four other regions in 2022 during an ongoing invasion. (Full article...)

Germany, officially the Federal Republic of Germany (FRG), is a country in Central Europe. It lies between the Baltic and North Sea to the north and the Alps to the south. Its 16 constituent states have a total population of over 84 million in an area of 357,569 km² (138,058 sq mi), making it the most populous member state of the European Union. It borders Denmark to the north, Poland and Czechia to the east, Austria and Switzerland to the south, and France, Luxembourg, Belgium, and the Netherlands to the west. The nation's capital and most populous city is Berlin and its main financial centre is Frankfurt; the largest urban area is the Ruhr.

Settlement in what is now Germany began in the Lower Paleolithic, with various tribes inhabiting it from the Neolithic onward, chiefly the Celts. Various Germanic tribes have inhabited the northern parts of modern Germany since classical antiquity. A region named Germania was documented before AD 100. In 962, the Kingdom of Germany formed the bulk of the Holy Roman Empire. During the 16th century, northern German regions became the centre of the Protestant Reformation. Following the Napoleonic Wars and the dissolution of the Holy Roman Empire in 1806, the German Confederation was formed in 1815.

Formal unification of Germany into the modern nation-state commenced on 18 August 1866 with the North German Confederation Treaty establishing the Prussia-led North German Confederation later transformed in 1871 into the German Empire. After World War I and the German Revolution of 1918–1919, the Empire was in turn transformed into the Weimar Republic. The Nazi seizure of power in 1933 led to the establishment of a totalitarian dictatorship, World War II, and the Holocaust. After the end of World War II in Europe and a period of Allied occupation, in 1949, Germany as a whole was organized into two separate polities with limited sovereignty: the Federal Republic of Germany, generally known as West Germany, and the German Democratic Republic, known as East Germany, while Berlin continued its de jure Four Power status. The Federal Republic of Germany was a founding member of the European Economic Community and the European Union, while the German Democratic Republic was a communist Eastern Bloc state and member of the Warsaw Pact. After the fall of the communist led-government in East Germany, German reunification saw the former East German states join the Federal Republic of Germany on 3 October 1990. (Full article...)

China, officially the People's Republic of China (PRC), is a country in East Asia. With a population exceeding 1.4 billion, it is the world's second-most populous country after India, representing 17.4% of the world population. China spans the equivalent of five time zones and borders fourteen countries by land. With an area of nearly 9.6 million square kilometers (3,700,000 sq mi), it is the third-largest country by total land area. The country is divided into 33 province-level divisions: 22 provinces, five autonomous regions, four municipalities, and two semi-autonomous special administrative regions. Beijing is the country's capital, while Shanghai is its most populous city by urban area and largest financial center.

China is considered one of the cradles of civilization: the first human inhabitants in the region arrived during the Paleolithic; by the late second millennium BCE, the earliest dynastic states had emerged in the Yellow River basin. The eighth to third centuries BCE saw a breakdown in the authority of the Zhou dynasty, accompanied by the emergence of administrative and military techniques, literature, philosophy, and historiography. In 221 BCE, China was unified under an emperor for the first time. Appointed non-hereditary officials began ruling counties instead of the aristocracy, ushering in more than two millennia of imperial dynasties including the Qin, Han, Tang, Yuan, Ming, and Qing. With the invention of gunpowder and paper, the establishment of the Silk Road, and the building of the Great Wall, Chinese culture—including languages, traditions, architecture, philosophy and technology—flourished and has heavily influenced both its neighbors and lands further afield. However, China began to cede parts of the country in the late 19th century to various European powers by a series of unequal treaties.

After decades of struggle, the 1911 Revolution resulted in the overthrow of the monarchy and the establishment of the Republic of China (ROC) the following year. The country under the nascent Beiyang government was unstable and ultimately fragmented during the Warlord Era, which was ended upon the Northern Expedition conducted by the Kuomintang (KMT) to reunify the country. The Chinese Civil War began in 1927, when KMT forces purged members of the rival Chinese Communist Party (CCP), who proceeded to engage in sporadic fighting against the KMT-led Nationalist government. Following the country's invasion by the Empire of Japan in 1937, the KMT and CCP temporarily agreed to a truce in favor of a united front against the Japanese. The Second Sino-Japanese War eventually ended in a Chinese victory; however, atrocities such as the Nanjing Massacre had a lasting impact on the country. The end of war with Japan in 1945 was quickly followed by a resumption of hostilities between the KMT and CCP. In 1949, the resurgent Communists established control over most of the country, proclaiming the People's Republic of China and forcing the Nationalist government to retreat to the island of Taiwan. The country was split, with both sides claiming to be the sole legitimate government of China. Following the implementation of land reforms, further attempts by the PRC to realize communism failed: the Great Leap Forward was largely responsible for the Great Chinese Famine that ended with millions of Chinese people having died, and the subsequent Cultural Revolution was a period of social turmoil and persecution characterized by Maoist populism. Following the Sino-Soviet split, the Shanghai Communiqué in 1972 would precipitate the normalization of relations with the United States. Economic reforms that began in 1978 led by reformists within the CCP moved the country away from a socialist planned economy towards an increasingly capitalist market economy, spurring significant economic growth. The corresponding movement for increased democracy and liberalization stalled after the Tiananmen Square protests and massacre in 1989. (Full article...)

Turkey, officially the Republic of Türkiye, is a country mainly in Anatolia in West Asia, with a smaller part called East Thrace in Southeast Europe. It borders the Black Sea to the north; Georgia, Armenia, Azerbaijan, and Iran to the east; Iraq, Syria, and the Mediterranean Sea (and Cyprus) to the south; and the Aegean Sea, Greece, and Bulgaria to the west. Turkey is home to over 85 million people; most are ethnic Turks, while ethnic Kurds are the largest ethnic minority. Officially a secular state, Turkey has a Muslim-majority population. Ankara is Turkey's capital and second-largest city. Istanbul is its largest city, and its economic and financial center, as well as the largest city in Europe. Other major cities include İzmir, Bursa and Antalya.

Human habitation began in the Late Paleolithic. Home to important Neolithic sites like Göbekli Tepe and some of the earliest farming areas, present-day Turkey was inhabited by various ancient peoples. Hattians were assimilated by the Anatolian peoples. Classical Anatolia transitioned into cultural Hellenization following the conquests of Alexander the Great; Hellenization continued during the Roman and Byzantine eras. The Seljuk Turks began migrating into Anatolia in the 11th century, starting the Turkification process. The Seljuk Sultanate of Rum ruled Anatolia until the Mongol invasion in 1243, when it disintegrated into Turkish principalities. Beginning in 1299, the Ottomans united the principalities and expanded; Mehmed II conquered Istanbul in 1453. During the reigns of Selim I and Suleiman the Magnificent, the Ottoman Empire became a global power. From 1789 onwards, the empire saw major transformation, reforms, and centralization while its territory declined.

In the 19th and early 20th centuries, persecution of Muslims during the Ottoman contraction and in the Russian Empire resulted in large-scale loss of life and mass migration into modern-day Turkey from the Balkans, Caucasus, and Crimea. Under the control of the Three Pashas, the Ottoman Empire entered World War I in 1914, during which the Ottoman government committed genocides against its Armenian, Greek and Assyrian subjects. Following Ottoman defeat, the Turkish War of Independence resulted in the abolition of the sultanate and the signing of the Treaty of Lausanne. The Republic was proclaimed on 29 October 1923, modelled on the reforms initiated by the country's first president, Mustafa Kemal Atatürk. Turkey remained neutral during most of World War II, but was involved in the Korean War. Coups in 1960 and 1980 interrupted the transition to a multi-party system. (Full article...)