The attack on Pearl Harbor by the Japanese on 12-7-41 was the event that provoked the Congress and Senate to vote the next day for declaring war on the Japanese. I am sure that is one of the options on your homework question.
Japan attack on Pearl Harbor
Germany attempting to form a military alliance with Mexico.
No, World War 1 ended in 1918 and the attack on Pearl Harbor was on December 7, 1941. Pearl Harbor was the event that provoked the US to enter World War 2, not 1.
sinking of lusitania
by Gerrnan submarine
by Gerrnan submarine
The Attack on Pearl harbor
The Germans' continued attacks on U.S. merchant vessels
The Sinking of the Lusitania and the Zimmerman telegram.
Two of them might be the Zimmerman telegram and the sinking of the Lusitania
you go outside