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  This was signed on July 4th 1776 and it declared that we were a independent country.
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  This was made to help other countries realize that america is not to be messed with.
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  this was a add on to the monroe doctrine
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  the Sinking of the Lusitania happened during world war 1
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  We joined to Stop the french from taking territory boundarys.
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  This was made to stop domestic afairs
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  we joined World War II in 1941
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  The japananese bombed pearl harbor.
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  A uranium gun-type atomic bomb (Little Boy) was dropped on Hiroshima
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  this was created to give assistance in greece and turkey.
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  President Harry Truman signed the Marshall Plan, granting $5 billion in aid to 16 European nations.
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  We joined this in 1950
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  promising military or economic aid to any Middle Eastern country needing help in resisting communist aggression.
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  The United States and the Soviet Union to the brink of nuclear conflict.
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  the US joined the Vietnam War in 1964.
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  The US joined this to stop the gulf war.
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  This was a time of desparation for the US.
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  This was declared in 2001.
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  This was made to stop Al-Qaeda and other terrorist groups.
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  this was made to stop conflict in iraq.
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  We bombed ISIS