What did the Russians lose in World War 1?

In World War I, Russia faced significant territorial losses, particularly in Eastern Europe, as it was forced to cede large areas to Germany and Austria-Hungary through the Treaty of Brest-Litovsk in 1918. Additionally, the war resulted in severe casualties, with millions of soldiers and civilians dead, wounded, or displaced. The socio-economic strain contributed to political upheaval, leading to the Russian Revolution and the eventual abdication of Tsar Nicholas II. Overall, Russia's defeat in the war marked a profound transformation in its political landscape and territorial integrity.