 But he later returned to the ring for financial reasons.During the 1980s Argüello briefly fought with the Contras in his native Nicaragua, but after a few months in the jungle he retired from the war.He then attempted several comebacks into boxing during the late 1980s and early 1990s and had some success, most notably a fourth round stoppage of former World Junior Welterweight Champion Billy Costello in a 1986 televised bout that put him in a position for another shot at the Junior Welterweight title.