Machine gun
the germans had alien technology
Stalemate.
Would you mind reposting your question with a little more information? There was a stalemate in most of World War I, but World War II happened in so many places, that I do not know of the occurence in your question . . .
Stalemate=cold war.
The major weapon of war used for the first time in 1916 was the tank. Introduced by the British during the Battle of the Somme, tanks were designed to overcome the stalemate of trench warfare by crossing difficult terrain and providing armored support to infantry. Their deployment marked a significant shift in military tactics and technology during World War I.
the germans had alien technology
Probably artillery; it was responsible for many of the deaths in World War 1.
The atomic bomb!
The United States entry into the war
The entry of the U.S. into the war.
Stalemate.
Would you mind reposting your question with a little more information? There was a stalemate in most of World War I, but World War II happened in so many places, that I do not know of the occurence in your question . . .
8 years
no one gains or looses ground
On a Coast Line somewhere
The stalemate generally refers to the Trench warfare in France 1915-1918.
the entry of the U.S. into the war.