Nicaragua
United States occupation (1909–1933)

In 1909, the United States supported the forces rebelling against President Zelaya. U.S. motives included differences over the proposed Nicaragua Canal, Nicaragua's potential to destabilize the region, and Zelaya's attempts to regulate foreign access to Nicaraguan natural resources. On November 18, 1909, U.S. warships were sent to the area after 500 revolutionaries (including two Americans) were executed by order of Zelaya. The U.S. justified the intervention by claiming to protect U.S. lives and property. Zelaya resigned later that year.

In August 1912, the President of Nicaragua, Adolfo Díaz, requested the secretary of war, General Luis Mena, to resign for fear he was leading an insurrection. Mena fled Managua with his brother, the chief of police of Managua, to start an insurrection. After Mena's troops captured steam boats of an American company, the U.S. delegation asked President Díaz to ensure the safety of American citizens and property during the insurrection. He replied he could not, and asked the U.S. to intervene in the conflict.

U.S. Marines occupied Nicaragua from 1912 to 1933, except for a nine-month period beginning in 1925. In 1914, the Bryan–Chamorro Treaty was signed, giving the U.S. control over a proposed canal through Nicaragua, as well as leases for potential canal defenses. After the U.S. Marines left, another violent conflict between Liberals and Conservatives in 1926 resulted in the return of U.S. Marines.

From 1927 to 1933, rebel general Augusto César Sandino led a sustained guerrilla war against the regime and then against the U.S. Marines, whom he fought for over five years. When the Americans left in 1933, they set up the Guardia Nacional (national guard), a combined military and police force trained and equipped by the Americans and designed to be loyal to U.S. interests.

After the U.S. Marines withdrew from Nicaragua in January 1933, Sandino and the newly elected administration of President Juan Bautista Sacasa reached an agreement that Sandino would cease his guerrilla activities in return for amnesty, a land grant for an agricultural colony, and retention of an armed band of 100 men for a year. However, due to a growing hostility between Sandino and National Guard director Anastasio Somoza García and a fear of armed opposition from Sandino, Somoza García ordered his assassination. Sacasa invited Sandino for dinner and to sign a peace treaty at the Presidential House on the night of February 21, 1934. After leaving the Presidential House, Sandino's car was stopped by National Guard soldiers and they kidnapped him. Later that night, Sandino was assassinated by National Guard soldiers. Later, hundreds of men, women, and children from Sandino's agricultural colony were murdered.
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