 By this point in Guevara's life, he deemed that U.S.-controlled conglomerates installed and supported repressive regimes around the world. In this vein, he considered Batista a "U.S. puppet whose strings needed cutting". Although he planned to be the group's combat medic, Guevara participated in the military training with the members of the Movement. The key portion of training involved learning hit and run tactics of guerrilla warfare. Guevara and the others underwent arduous 15-hour marches over mountains, across rivers, and through the dense undergrowth, learning and perfecting the procedures of ambush and quick retreat. From the start Guevara was Alberto Bayo's "prize student" among those in training, scoring the highest on all of the tests given. At the end of the course, he was called "the best guerrilla of them all" by their instructor, General Bayo.
