The Brave and the Bold #97 (DC, 1971 — Cover A)

While Bruce Wayne is vacationing in South America, as Batman he saves a young boy named Luis Mercado from a sniper's bullet. Following the boy into town, he learns that his old friend Wildcat is also in the area, resuming his career as a boxer. Observing Wildcat's match and spotting somebody putting a chemical in his drinking water, Batman strikes and helps Wildcat and Luis escape. He learns that Wildcat has amnesia, and that Luis is being targeted by a crime boss named El Grande.