Which political group saw the war as "Class Conflict" ex. Imperialists vs Workers?

What belligerent nation practiced "unrestricted submarine warfare"?

This luxury liner was sunk in 1915 killing 128 U.S. citizens causing many in the U.S. to want war.

This was the promise made by Germany in 1916 to the U.S. not to sink any more ships without warning

The "Zimmerman Note" was a coded message sent to ________ by Germany asking for support in the war

The name of Russian Communists who successfully overthrew the Russian Monarchy.

Who was the leader of the Russian Communists in 1917 who overthrew the Tsar?

The U.S. military force sent to France was known as the __

The commanding officer of U.S. forces sent to France in 1917.

The system used to combat German U-boats that allowed U.S. ships to transport the U.S. Army to France safely.

One of the more famous African-American US units in the U.S. Army actually fought for the French Army.

The largest collection of battles the U.S. Army fought in WWI was the

One of the more famous U.S. heroes of WWI, he was originally a pacifist & did not want to join the army. ___

This African American hero of WWI was initially refused a Congressional Medal of Honor, but would receive it after his death in 2015

BONUS: What was the nickname of U.S. soldiers in WWI?