The Treaty of Belgrade is signed, whereby Austria cedes lands south of the Sava and Danube rivers to the Ottoman Empire.

The Treaty of Belgrade, also known as the Belgrade Peace, was a peace treaty between the Habsburg Monarchy and Ottoman Empire, that was signed on September 18, 1739, in Belgrade, thus ending the Austro-Turkish War (1737–1739). Agreed territorial changes were substantial, and also favorable for the Ottoman side, since Habsburgs had to cede three regions: the Banat of Craiova, the Kingdom of Serbia with Belgrade, and Bosnian section of Posavina, thus placing the newly defined Habsburg-Ottoman border on the rivers Sava and Danube.