-
Gavrilo Princip assassinates Archduke Francis Ferdinand
-
Austria declares war with Serbia.
-
Everyone fighting in WWI stopped fighting on Christmas Eve because it was a holiday.
-
a German U-boat fires on a passenger ship called the Lusitania, killing 128 americans
-
Germany agreed to give warning before sinking passenger ships.
-
Britain discovers the Zimmerman note. Germany was trying to convince Mexico to become allies.
-
the US ends its state of neutrality, and prepares for war
-
WWI came to an end. It was ended on the eleventh day of the eleventh month at eleven in the morning.
-
A peace treaty that ended the war between Germany and the allied powers.
-
an organization that united nations after WWI
