The Spanish Republican Armed Forces (Spanish: Fuerzas Armadas de la República Española) were initially formed by the following two branches of the military of the Second Spanish Republic:Spanish Republican Army (Ejército de la República Española (1931-1936) and Ejército Popular de la República Española (1936-1939)). It included the Aeronáutica Militar air arm. Spanish Republican Navy (Marina de Guerra de la República Española), which included the naval aviation (Aeronáutica Naval)