February 24 1917 The Zimmermann Telegram is given to the U.S from Britain saying that the Germans want to have a alliance with Mexico Against the U.S
April 6 The U.S declares war on Germany
June 26 The First US troops arrive in France, 1st Division
December 7 US declares war on Austria-Hungary
January 8 1918 President Wilson makes his "Fourteen Points" speech to congress
January 10-15 1919 Communist revolt in Berlin
Jan 25 Peace conference accepts the principle of a league of nations
May 7- June 28 The Treaty of Versailles drafted and signed
This map shows the Different Country's in Europe during ww1and what side each of the Country's are apart.
As you can see The different color's show which Country's lost or gained land after the war ended in 1919.