"17 de Octubre" was one of the main naval units that joined the 1955 coup in which Perón was overthrown, and was renamed "General Belgrano" after General Manuel Belgrano, who founded the "Escuela de Náutica" (School of Navigation) in 1799 and had fought for Argentine independence from 1811 to 1819. "General Belgrano" accidentally rammed her sister ship "Nueve de Julio" on exercises in 1956, which resulted in damage to both. "General Belgrano" was outfitted with the Sea Cat anti-aircraft missile system between 1967 and 1968.