In 1937 he began two years of studies at the Norwegian Military Academy, becoming a lieutenant serving in the Kongsberg and Bergen anti-aircraft command in 1939.

[1][6] He had recently graduated from the Norwegian Military Academy as an anti-aircraft officer, and, as a lieutenant, commanded an improvised heavy machine gun company fighting at Rjukan until the forces there were dissolved on 3 May 1940, following the Allied evacuation from southern and central Norway.

[7][8] Although Rjukan and the entire county of Telemark had been considered by the Norwegian military leadership as having no strategic value, it was nonetheless defended following requests by the Allies, who wanted the heavy water production facilities at Rjukan defended against the advancing German forces.

Here he was given tickets to travel the "long way" to Britain: aircraft to Moscow, by train to Odessa, by boat over the Black Sea, then by ship from Suez around the Cape of Good Hope to the Atlantic Ocean, finally ending up in Glasgow in September 1941.

Hauge was authorized to select volunteers from the whole Norwegian Brigade, but with the core from Company 4 which recently had undergone the shock troops training course.

[17] In January 1943 a detachment from the troop participated in Operation Cartoon, an attack on the pyrite mines of Stordø Kisgruber at Litlabø near Sagvåg in Stord, Norway.

From January 1944 they were stationed in Shetland, where they took part in raids to the Norwegian coast, and in June they moved back to Eastbourne.

Hauge's unit took part in the Battle of the Scheldt, in particular the Operation Infatuate, the victorious attack on Walcheren in November 1944.

[25][26] After the first Norwegian assault against the German lines had resulted in more than 50% casualties, Hauge had called off the renewed attacks ordered by No.

5 Norwegian Troop saw no further fighting during the war after the Kapelsche Veer attack,[23] being instead sent to officially neutral Sweden on 1 May 1945.