U.S. intervention in Nicaragua, ruled by José Santos Zelaya
"United States interest in Nicaragua, which had waned during the last half of the 1800s because of isolationist sentiment following the United States Civil War (1861-65), grew again during the final years of the Zelaya administration. Angered by the United States choice of Panama for the site of a transisthmian canal, President Zelaya made concessions to Germany and Japan for a competing canal across Nicaragua. Relations with the United States deteriorated, and civil war erupted in October 1909, when anti-Zelaya liberals joined with a group of conservatives under Juan Estrada to overthrow the government. The United States broke diplomatic relations with the Zelaya administration after two United States mercenaries serving with the rebels were captured and executed by government forces. Soon thereafter, 400 United States marines landed on the Caribbean coast. Weakened and pressured by both domestic and external forces, Zelaya resigned on December 17, 1909. His minister of foreign affairs, José Madriz, was appointed president by the Nicaraguan Congress. A liberal from León, Madriz was unable to restore order under continuing pressure from conservatives and the United States forces, and he resigned on August 20, 1910."
— Country Studies