 In 1931 "Borea" together with , "Ostro" and as well as older , and formed 1st Destroyer Flotilla, part of II Naval Division.In 1934 after another reorganization "Borea" as well as , and "Ostro" were again reunited, now forming the 4th Destroyer Squadron, part of II Naval Division.During the Spanish Civil War "Borea" conducted 4 reconnaissance missions in autumn 1936 on behalf of the Nationalists.