 In the fighting that followed the German invasion on 9 April 1940 the "Trygg" class would see first line action as these ships were often all that was available to the Norwegian forces.In 1932, the Norwegian Labour Party made public a proposal crafted by Fredrik Monsen, that the armed forces be dissolved entirely and replaced by a "civil guard".The civil guard would include 18 "Trygg" class vessels, with the armament of two 76 mm main guns and two twin 45 cm torpedo tubes retained.