How did militarism cause wwi? how did nationalism cause wwi? how did alliances cause wwi? how did imperialism cause wwi? how did the assassination of franz ferdinand cause wwi? why did unrestricted submarine warfare cause the usa to enter the war? why did the zimmerman telegram push the usa into the war? technology advances from wwi harlem hell fighters (who? why important? ) role of women in the war the great migration how did the map of europe change after the war? what is propaganda? how did it influence people? what was america's policy at the beginning of wwi when did the usa enter the war? what was the selective service act? how was agriculture in the usa involved in the war effort? what did the war industries board do? what did the war labor board do? what were liberty bonds and how did they the war? what was the treaty of brest-litovsk? why did president wilson have different goals for peace after the war (compared to europe)? what happened to wilson's 14 points? how did the treaty of versailles punish germany (multiple examples)? did the us sign the treaty of versailles? did the us join the league of nations? how was the treaty of versailles a failure?