There is a noble reason that is used for propaganda purposes and movies, than there is the real reason.
1912 – Cuba. June 5 to August 5. U.S. forces protected American interests in the province of Oriente and in Havana.[RL30172]Bay of Pigs
Stop Communism and its influence on the U.S.
1917–18 – World War I. On April 6, 1917, the United States declared war with Germany and on December 7, 1917, with Austria-Hungary. Entrance of the United States into the war was precipitated by Germany's submarine warfare against neutral shipping and the Zimmermann Telegram.[RL30172]
The United States entered WWI in the same year of the Bolshevik Revolution in Russia, an uprising by workers and peasants. Stop Communism or worker uprisings in the U.S.
1941–45 – World War II. On December 8, 1941, the United States declared war with Japan in response to the bombing of Pearl Harbor. Germany declared war against the United States.[RL30172]
The U.S. antagonizes Japan into attacking by blocking fuel shipments, the U.S. got involved to stop the spread of Communism or Socialism as evidenced by the actions of the U.S. to take over territories with Russia and the Cold War.
The Cold War- Stop Communism and its influence on the U.S.
1950–53 – Korean War. The United States responded to North Korean invasion of South Korea by going to its assistance, pursuant to United Nations Security Council resolutions. US forces deployed in Korea exceeded 300,000 during the last year of the conflict. Over 36,600 US military were killed in action.
Stop Communism and its influence on the U.S. Forced subjugation of a capitalist system and beliefs.
1959–75 – Vietnam War. US military advisers had been in South Vietnam for a decade, and their numbers had been increased as the military position of the Saigon government became weaker. After citing what he termed were attacks on US destroyers in the Tonkin Gulf, President Johnson asked in August 1964 for a resolution expressing US determination to support freedom and protect peace in Southeast Asia. Congress responded with the Tonkin Gulf Resolution, expressing support for "all necessary measures" the President might take to repel armed attacks against US forces and prevent further aggression. Following this resolution, and following a communist attack on a US installation in central Vietnam, the United States escalated its participation in the war to a peak of 543,000 military personnel by April 1969.
Stop Communism and its influence on the U.S. Forced subjugation of a capitalist system and beliefs.
1983 – Grenada. Operation Urgent Fury. Citing the increased threat of Soviet and Cuban influence and noting the development of an international airport following a coup d'état and alignment with the Soviets and Cuba, the U.S. invades the island nation of Grenada.
Stop Communism and its influence on the U.S. Forced subjugation of a capitalist system and beliefs.
1990 – Saudi Arabia: On August 9, 1990, President Bush reported that he launched Operation Desert Shield by ordering the forward deployment of substantial elements of the U.S. armed forces into the Persian Gulf region to help defend Saudi Arabia after the August 2 invasion of Kuwait by Iraq. On November 16, 1990, he reported the continued buildup of the forces to ensure an adequate offensive military option.[RL30172]American hostages being held in Iran.[RL30172]
Oil, prevent Saddam Hussein from monopolizing the oil market.
2003–2011 – War in Iraq. Operation Iraqi Freedom. March 20, 2003. The United States leads a coalition that includes Britain, Australia and Spain to invade Iraq with the stated goal being "to disarm Iraq in pursuit of peace, stability, and security both in the Gulf region and in the United States."
Oil-Forced privatization of oil industry.