1.
revolution led to advanced militarizes
2.
Germany's biggest problem when the war began
3.
a German Uboat sank this British ship
4.
on April 2 1917 the US _______ war on Germany
5.
in November 1917 _______ signed a peace treaty
6.
In the battle of ________ 1 million were killed or hurt
7.
the treaty of ______ was signed ending the war
