Iceland experienced an economic boom during the occupation, since many Icelanders took jobs working for the foreigners, and some say that "bretavinnan" (roughly, the British Jobs) provided some of the successes of the post-war Icelandic economy. On 17 June 1944, with American encouragement, Iceland became a permanently independent republic, and it cut all ties with Denmark. Despite being occupied, Iceland remained officially neutral throughout the duration of the Second World War. Icelandic air bases such as at Keflavík were important to the Allied fight against the German U-boats in the Battle of the Atlantic.