Europe 1920: Treaty of Sevres
Ottoman Turkey was the last of the Central Powers to sign a treaty with the victorious Allies, surrendering much of its Middle Eastern empire to the British, French, Greeks, and Armenians. However in reality the Treaty was essentially worthless as it was the Nationalists, not the Ottomans, who now ruled Turkey.
11 Jul 1920 East Prussian plebiscite▲
East Prussian plebiscite zone votes to rejoin Germany
12 Jul 1920 Soviet Russia
10 Aug 1920 Treaty of Sèvres▲
The Treaty of Sèvres was signed between the Ottoman Empire and the United Kingdom, France, Italy, Japan, and a number of minor Allied Powers including Greece and Armenia in Sèvres, France. The Treaty ceded large parts of the Ottoman Empire to Britain, France, Greece, and Armenia, and established European spheres of influence in the remaining territory.
12–25 Aug 1920 Battle of Warsaw▲
By June 1920, the Polish advance into Belarus and Ukraine was halted, and the Soviet Army began pushing back into what had been Polish territory before the outbreak of the war. British Foreign Secretary George Curzon petitioned the Soviets to ceasefire at what became known as the Curzon Line, but the Soviets refused and reached the Vistula by August. However, Polish forces intercepted and cut off the Soviets outside of the capital Warsaw, leading to massive Soviet casualties and a frantic, disorganized retreat.