the day of 9/11 was September 11, 2001, al-Qaeda terrorists hijacked commercial aircraft flights and crashed them into the World Trade Center and the Pentagon. After the Taliban refused to hand up al-Qaeda commanders, the US invaded Afghanistan.
The Cuban missile crisis
the soviet union had many gotten nuclear weapons. Castro had acquired some American companies. The exiles intended to invade Cuba and remove Castro, and the CIA armed and trained them. In April 1961, only four months after Kennedy took office, 1400 Cuban exiles landed at the Bay of Pigs, and CIA jets bombarded Cuban airfields the night before the operation. On the day of the invasion, however, Kennedy declined to provide air support to the exiles, and the exiles were defeated.
vietnam war
protesters in Iran For more than a year, shad-sized employees from the US embassy in Tehran were held as prisoners.
the cold war
Stopping the deployment of nuclear missiles on Cuba is the closest the war has ever come to becoming a nuclear war.
it lasted 9 year and the purpose was to stop the spread of communism in Asia and to help and ally
the us vs soviet union it was about 3 years long and it was made to prevent communism