-
War Begins
-
Sinking of RMS Lusitania
-
Zimmerman Telegram
-
German U-Bots Sink U.S. Merchant Vessels
-
U.S. Declares War on Central Powers
-
First U.S. Troops Arrive in France
-
One Million U.S. Soldiers in France
-
First U.S. Offensive, Battle of Cantigny
-
Armistice Day