The attack on Pearl Harbor was the factor that made the United States decide to enter the war.
The sinking of the Lusitania was the spark for US entry into WW I.
The Japanese sneak attack on Pearl Harbor propelled the US into the war.
One reaon was Pearl Harbor.
A few volunteered for military service.
Fresh manpower was needed to break the stalemate.
The Franco-Prussian War was not directly related to the entry of the US into World War I.
The sinking of the Lusitania was the spark for US entry into WW I.
do you mean what caused us entry into world war one? if so then the sinking of the USS Lusitania by German u-boats was what caused American entry into the war
the entry of US troops.
mr
The Japanese sneak attack on Pearl Harbor propelled the US into the war.
nerd
yes
The attack on Pearl Harbor.
pearl harbour
The Allies.
Economic gain.