|Battle of Maritsa|
|Part of the Ottoman wars in Europe and the Serbian-Ottoman Wars|
Balkans in September of 1371
|Serbian Empire||Ottoman Empire|
|Commanders and leaders|
Vukašin Mrnjavčević † |
Uglješa Mrnjavčević †
Alexander Komnenos Asen †
Lala Shahin Pasha|
|Casualties and losses|
Heavy combat losses|
The Battle of Maritsa or Battle of Chernomen (Serbian: Marička bitka / Маричка битка, Turkish: Çirmen Muharebesi, İkinci Meriç Muharebesi in tr. Second Battle of Maritsa) took place at the Maritsa River near the village of Chernomen (present-day Ormenio, Greece) on 26 September 1371 between Ottoman forces commanded by Lala Şahin Pasha and Evrenos, and Serbian forces commanded by King Vukašin Mrnjavčević and his brother Despot Jovan Uglješa.
In 1354, the Ottomans acquired Gallipoli. From there, they expanded into Thrace, taking the important city of Adrianople in 1369. They reached the borders of Uglješa's lands. Uglješa tried to create a coalition against them. He failed to secure support from the Byzantines and the Bulgarians. Most of the Serbian lords were occupied fighting each other and the only Serbian lord who supported Uglješa's ideas was his brother Vukašin.
In the summer of 1371, Vukašin marched to Zeta, to support his relative Đurađ Balšić in his war against Nikola Altomanović. His army was in Skadar, waiting for naval support from the Republic of Ragusa. Uglješa received information that the majority of Ottoman forces left Europe and marched to Anatolia. He decided it was a good time to execute his offensive plans and asked Vukašin for help. Vukašin left Skadar with his army and joined Uglješa. They marched against Adrianople.
The Serbian army numbered between 50,000 and 70,000 men. Despot Uglješa wanted to make a surprise attack on the Ottomans in their capital city, Edirne, while Murad I was in Asia Minor. The Ottoman army was much smaller, Byzantine Greek scholar Laonikos Chalkokondyles and different sources give the number of 800 up to 4,000 men, but due to superior tactics, by conducting a night raid on the Serbian camp, Şâhin Paşa was able to defeat the Serbian army and kill King Vukašin and despot Uglješa. Thousands of Serbs were killed, and thousands drowned in the Maritsa river when they tried to flee. After the battle, it was said, the Maritsa ran scarlet with blood.
South Serbia fell under Ottoman power after this battle. The battle was a part of the Ottoman campaign to conquer the Balkans and was preceded by the Ottoman capturing of Sozopol in modern Bulgaria and succeeded by the capture of the cities of Drama, Kavála, and Serrai in modern Greece. The battle preceded the later 1389 Battle of Kosovo, and was one of many in the Serbian–Turkish wars.