Question

Which of the following events helped provoke the united states to enter world war 1
a. the bombing of pearl harbor
b. the attack on the Alamo
c. the fall of Poland
d. Germany attempting to form a military alliance with mexico

Answer 1

It was "d. Germany attempting to form a military alliance with Mexico," that was one of the events that helped provoke the United States to enter World War 1, although a more significant reason why the German's use of unrestricted submarine warfare. 

Answer 2

Germany attempting to form a military alliance with mexico helped provoke the united states to enter world war 1