Banana Wars in the context of "United States occupation of Haiti"

The participation of the United States in regime change in Latin America involved U.S.-backed coup d'états which were aimed at replacing left-wing leaders with right-wing ones, military juntas, or authoritarian regimes. Intervention of an economic and military variety was prevalent during the Cold War. Although originally in line with the Truman Doctrine of containment, United States involvement in regime change increased following the drafting of NSC 68, which advocated more aggressive actions against potential Soviet allies.

In the early 20th century, during the "Banana Republic" era of Latin American history, the U.S. launched several interventions and invasions in the region (known as the Banana Wars) in order to promote American business interests. United States influenced regime change in this period of Latin American history which started after the signing of the Treaty of Paris in the wake of the Spanish–American War. Cuba gained its independence, while Puerto Rico was annexed by the United States. Expansive and imperialist U.S. foreign policy combined with new economic prospects led to increased U.S. intervention in Latin America from 1898 to the early 1930s. Continued activities lasted into the late 20th century.

The United States occupation of Nicaragua from August 4, 1912, to January 2, 1933, was part of the Banana Wars, when the U.S. military invaded various Latin American countries from 1898 to 1934. The formal occupation began on August 4, 1912, even though there were various other assaults by the United States in Nicaragua throughout this period. American military interventions in Nicaragua were designed to stop any nation other than the United States of America from building a Nicaraguan Canal.

Nicaragua assumed a quasi-protectorate status under the 1916 Bryan–Chamorro Treaty. President Herbert Hoover (1929–1933) opposed the relationship. On January 2, 1933, Hoover ended the American intervention.

The United States has been involved in hundreds of interventions in foreign countries throughout its history, engaging in nearly 400 military interventions between 1776 and 2023, with half of these operations occurring since 1950 and over 25% occurring in the post-Cold War period. Common objectives of U.S. foreign interventions have historically revolved around economic opportunity, protection of U.S. citizens and diplomats, territorial expansion, counterterrorism, fomenting regime change and nation-building, promoting democracy and enforcing international law.

There have been two dominant ideologies in the United States about foreign policy—interventionism, which encourages military and political intervention in the affairs of foreign countries—and isolationism, which discourages these.

William Daniel Leahy (/ˈleɪ(h)i/ LAY-(h)ee; 6 May 1875 – 20 July 1959) was an American naval officer and was the most senior United States military officer on active duty during World War II; he held several titles and exercised considerable influence over foreign and military policy. As a fleet admiral, he was the first flag officer ever to hold a five-star rank in the U.S. Armed Forces.

An 1897 graduate of the United States Naval Academy, Leahy saw active service in the Spanish–American War, the Philippine–American War, the Boxer Rebellion in China, the Banana Wars in Central America, and World War I. He was the first member of his cadet class to reach flag rank, as the Chief of the Bureau of Ordnance from 1927 to 1931. He subsequently served as Chief of the Bureau of Navigation from 1933 to 1936, and commanded the Battle Fleet from 1936 to 1937. As Chief of Naval Operations from 1937 to 1939, he was the senior officer in the United States Navy, overseeing the expansion of the fleet and preparations for war.

The Thompson submachine gun (also known as the "Tommy gun", "Chicago typewriter", or "trench broom") is a blowback-operated, selective-fire submachine gun, invented and developed by Brigadier General John T. Thompson, a United States Army officer, in 1918. It was designed to break the stalemate of trench warfare of World War I, although early models did not arrive in time for actual combat. The Thompson saw early use by the United States Marine Corps during the Banana Wars, the United States Postal Inspection Service, the Irish Republican Army, the Republic of China, and the FBI following the Kansas City massacre.

The weapon was also sold to the general public. Because it was so widely used by criminals, the Thompson became notorious during the Prohibition era as the signature weapon of various organized crime syndicates in the United States in the 1920s. It was a common sight in the media at the time, and was used by both law enforcement officers and criminals. The Thompson was widely adopted by the U.S. armed forces during World War II, and was also used extensively by other Allied troops during the war. Its main models were designated as the M1928A1, M1, and M1A1 during this time. More than 1.5 million Thompson submachine guns were produced during World War II.