In Guatemala City , Guevara sought out Hilda Gadea Acosta , a Peruvian economist who was well-connected politically as a member of the left-leaning Alianza Popular Revolucionaria Americana (APRA, American Popular Revolutionary Alliance). She introduced Guevara to a number of high-level officials in the Arbenz government . Guevara then established contact with a group of Cuban exiles linked to Fidel Castro through the July 26, 1953, attack on the Moncada Barracks in Santiago de Cuba . During this period, he acquired his famous nickname, due to his frequent use of the Argentine filler syllable che (a multi-purpose discourse marker , like the syllable " eh " in Canadian English).  During his time in Guatemala, Guevara was helped by other Central American exiles, one of whom, Helena Leiva de Holst , provided him with food and lodging,  discussed her travels to study Marxism in Russia and China,  and to whom, Guevara dedicated a poem, "Invitación al camino".