 He had expected to deal only with the Bolivian military , who were poorly trained and equipped , and was unaware that the United States government had sent a team of the CIA 's Special Activities Division commandos and other operatives into Bolivia to aid the anti @-@ insurrection effort . The Bolivian Army would also be trained , advised , and supplied by U.S. Army Special Forces , including a recently organized elite battalion of U.S. Rangers trained in jungle warfare that set up camp in La Esperanza , a small settlement close to the location of Guevara 's guerrillas . 
