Political map of South American nations 28 April 1885 (Panama Crisis): In April 1885 the United States occupied the Colombian state of Panama (Panama Crisis of 1885) to protect American interests in the face of a local revolt. In response, Chile sent the protected cruiser Esmeralda (Chilean cruiser Esmeralda)—possibly the most powerful ship in the Pacific at the time—to Panama. Alarmed by this action, but considering the revolt suppressed, the US withdrew, allowing Colombia to restore its rule in the isthmus.