The war's end triggered the abdication of various monarchies and the collapse of four of the last modern empires of Russia, Germany, Ottoman Turkey and Austria-Hungary, with the latter splintered into Austria, Hungary, southern Poland (who acquired most of their land in a war with Soviet Russia), Czechoslovakia and Yugoslavia, as well as the unification of Romania with Transylvania and Moldavia. However, each of these states (with the possible exception of Yugoslavia) had large German and Hungarian minorities, creating some unexpected problems that would be brought to light in the next two decades. (See Dissolution of Austro-Hungarian Empire: Successor states for better description of composition of names of successor countries/states following the splinter.)
Armenian genocide during and just after World War I. It was characterised by the use of massacres and deportations involving forced marches under conditions designed to lead to the death of the deportees, with the total number of Armenian deaths generally held to have been between one and one-and-a-half million.
Mexican Revolution (1910–1920) Francisco I. Madero proclaims the elections of 1910 null and void, and calls for an armed revolution at 6 p.m. against the illegitimate presidency/dictatorship of Porfirio Díaz. The revolution leads to the ousting of Porfirio Díaz (who ruled from 1876 to 1880 and since 1884) six months later. The Revolution progressively becomes a civil war with multiple factions and phases, culminating with the Mexican Constitution of 1917, but combat would persist for three more years.
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The RMS Titanic, a British ocean liner which was the largest and most luxurious ship at that time, struck an iceberg and sank two hours and 40 minutes later in the North Atlantic during its maiden voyage on April 15, 1912. 1,517 people perished in the disaster.
The first jazz music is recorded by the Original Dixieland Jass Band for Victor (#18255) in late February, 1917.
The Salvation Army has a new international leader, General Bramwell Booth who served from 1912 to 1929. He replaces his father and co-founder of the Christian Mission (the forerunner of the Salvation Army), William Booth.
The 1913 Armory Show in New York City was a seminal event in the history of Modern Art. Innovative contemporaneous artists from Europe and the United States exhibited together in a massive group exhibition in New York City, and Chicago.