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
Militarism, the other three causes for US entry into the war are imperialism nationalism and alliances.
After World War 2, the US had the strongest economy in the world.
Germany fought the us in world war 1
The US helped France in world war 1 with submarines in the Atlantic.
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They got in the war because German ships sunk U.S cargo ships
The Monroe Doctrine
Name the 4 causes of world war I
The Jews
nationalistic tensions, unresolved issues, and resentments
If you include pre US involvment , 3,280 days . German Surrender was at day 3,276 . Japan Surrendered 4 days later.
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
Militarism, the other three causes for US entry into the war are imperialism nationalism and alliances.
The French Indochina War most likely led to the (so called) American Vietnam War. Because the French war divided up the country into TWO nations; North & South Vietnams. When the communist led North Vietnam attempted to take over (conquer) South Vietnam... this led to US involvment.
Japan's inursion in Manchuria, the US Embargo on Japan, the German Invasion of Poland, the Japanese attack on Pearl Harbor and Hitler's decleration of war against the US.
Most likely the pleas from the French government during the battle of Dien Bien Phu, a french fort situated in the North of Vietnam, the Americans were asked to intervene as the fort was under heavy siege and would fall if there wasn't action taken immediately, the Americans didn't intervene due to there being no other country who would also intervene aswell, that was the first issue that the Americans dealt with in Southeast Asia, this would then lead to the Second Indo-China war (Vietnam War) which had full US involvment.