In the same manner as the other two branches of the Spanish Republican Armed Forces, the Spanish Republican Navy went through two clear phases during its existence: * The pre-Civil War phase, before the coup of July 1936 that would fracture the Spanish military institution * The situation after the pro-fascist coup, when most of the fleet remained loyal to the republican government after the crews had overrun their officers and formed committees. Faced with the coup, many officers joined it and others hesitated; only about 5% of the top officers stood steadfastly for the Spanish Republic. The officer corps was later partially reinstated with the aim of improving coordination in the course of the Spanish Civil War.