Captain Irvine Glennie assumed command in May 1939 and Hood was assigned to the Home Fleet's Battlecruiser Squadron while still refitting. When war broke out later that year, she was employed principally to patrol in the vicinity of Iceland and the Faroe Islands to protect convoys and intercept German merchant raiders and blockade runners attempting to break out into the Atlantic. On 25 September 1939, the Home Fleet sortied into the central North Sea to cover the return of the damaged submarine Spearfish.