History quiz

A stalemate is a situation in which further action blocked. The during World War 1 was broken 1917 by?

The stalemate during World War 1 was broken in 1917 by the United States' entry into the war.

The United States' entry into the war brought fresh troops, supplies, and morale to the Allied Powers. This helped to break the stalemate on the Western Front and led to the eventual Allied victory in 1918.