The United States became involved in World War II due to the attack on Pearl Harbor by the Japanesse. The United States had to act after the unprovoked and unwarned attack on one of its Military bases.
The Japanese attacked Pearl Harbor, Hawaii, prompting the Americans to declare war on them. The Germans, being Japan's allies, then declared war on the USA.
Basically it was the Japanese attack on the US Pacific Fleet at Pearl Harbor, Hawaii which brought it into WW2.
1941
How_did_the_us_involvment_in_World_War_2_escolate
The US is not yet involved in world 11. The next world war should be WWIII so they have a way to go.
From supplying the weapons of war to becoming the primary combatant.
They got involed in the war because the Japanese bombed pearl harbour.
1941
they were a allie.
The immediate cause was Japan's attack on Pearl Harbor. This caused the US to declare war on Japan, which led to Germany and Italy declaring war on the US.
How_did_the_us_involvment_in_World_War_2_escolate
1945
Supplying Allies with weapons
The Japanesse surrender.
Self defense, the US was attacked.
The Persian War was 499-449 BCE. The US did not exist for another 2300 years.
the report strengthened isolationist statement in the United States
The US is not yet involved in world 11. The next world war should be WWIII so they have a way to go.
December 7th 1941