On a headland at the south end of Copacabana is a military base that shares the beach’s name: Fort Copacabana. The Brazilian army constructed the defense in 1914 to help protect Rio’s harbor. This witnessed only one battle. Surprisingly, the conflict came from within. In 1922, a group of officers known as Tenentism staged a rebellion against the republic by firing cannons at key government targets within the city. The 18 of the Copacabana Fort revolt was suppressed within 24 hours. Since the base was deactivated in 1987, Forte de Copacabana has been maintained in great condition.