The only Nicaraguan general to refuse to sign this pact ("el tratado del Espino Negro") was Augusto César Sandino. He took refuge in the northern mountains of Las Segovias. He led a sustained guerrilla war, first against the Conservative regime and subsequently against the U.S. Marines, who withdrew upon the establishment of a new Liberal government. When the Americans left in 1933 as a result of Sandino's guerrilla war and the Great Depression, they set up the Guardia Nacional (National Guard), a combined military and police force trained and equipped by the Americans, designed to be loyal to U.S. interests. Anastasio Somoza García, a close friend of the American government, was put in charge. He was one of the three rulers of the country, the others being Sandino and the mostly figurehead President Juan Bautista Sacasa.