There were many factors which moved the US toward hostilities in World War II, but the causus belli was the Japanese attack on the US fleet at Pearl Harbor on Dec 7th, 1941. The US immediately declared war on Japan, after which Germany (rather inexplicably) declared war on the US.
The bombing of Pearl Harbor by Japan pulled the U.S. into WWII
Japanese attack on pearl harbor in 1941
The Zimmermann Note, submarine warfare
1941
the us decided to enter world war because they want the resources of France, and they want to keep on ruling france.
The bombing of Pearl Harbor by Japan pulled the U.S. into WWII
sinking of lusitania
Japan bombed pearl harbor
No. The Soviet Union did enter World War 2 but on the other side. Germany invaded and then forced the Soviet Union into the war
Japanese attack on pearl harbor in 1941
The Japanese attack on Pearl Harbour on 7th December 1941 followed by the German declaration of war on the US on 11th December.
A harbor and navy base near Honolulu, Hawaii. It was the site of the surprise Japanese attack on the US that forced the US to enter world War 2.
Japan , with it's attack upon Pearl Harbor .
Persia did NOT fight in World War 1.
World War 2
us was directly not involved in world war 1 but was simply supporting allied powers like britain ,russia,etc by selling modern technology weapons as it had some sympethetical support for people of countries like britain but lastly usa was forced to enter the war when one of its submarines named i think not sure "luisitinina"was sunk down by the germans in mid 1917 so america was now forced to enter the war in favour of allied powers
War guilt clause