Hipper took part in the German invasion of Norway (Operation Weserübung) on 9 April1940, successfully entering the harbour of Trondheim (Norway's third largest city, roughly half way up Norway's west coast). The troops carried on board Hipper occupied the city in the early hours, flying the Nazi flag on the city's old Kristiansten fortress and other municipal buildings before most of the inhabitants had even awoken.
Hipper technical data (http://www.german-navy.de/kriegsmarine/ships/heavycruiser/admiralhipper/index.html) – From German naval history website german-navy.de (http://www.german-navy.de)