Why is Russia considered the biggest loser of World War 1?

Russia is considered The Biggest Loser of World War I due to the severe consequences it faced following the war. The country experienced massive military defeats, high casualties, and significant economic strain, which exacerbated public discontent. The ensuing social unrest culminated in the Russian Revolution of 1917, leading to the collapse of the Tsarist regime and the establishment of a communist government. Additionally, the Treaty of Brest-Litovsk in 1918 forced Russia to cede large territories, further diminishing its power and influence in Europe.