German forces, the Norwegian army was only able to partially mobilize. Unit strengths were only a fraction of their paper establishments. Unlike the armies of most other nations, the Norwegian "division" was more of an administrative and mobilization unit, rather than a fighting formation. The most important tactical unit of the Norwegian army was the regiment. When mobilized, each regiment was supposed to muster two battalions of infantry of the line, and one battalion of landvern. Some of the Norwegian forces were ad hoc battalions. The commander of the Norwegian Army at the time of the invasion was General Kristian Laake. He was replaced by Colonel Otto Ruge on 11 April. Each Regiment had 3,750 soldiers, with 60,000 being the total number of soldiers by 1940. Every battalion had around 1,250 soldiers. However, only 55,000 soldiers were well prepared. Norwegian Army The Royal Guards battalion – based in Oslo and Elverum, the only unit in Southern Norway that received proper training during the inter-war years. 1st Division – This division had its headquarters in Halden, and was commanded by Major-General Carl Johan Erichsen. 1st Infantry Regiment (based in Fredrikstad) 2nd Infantry Regiment (based in Oslo) 3rd Infantry Regiment (based in Kongsberg) 2nd Division – This division had its headquarters in Oslo, and was commanded by Major-General Jacob Hvinden Haug. 4th Infantry Regiment (based in Trandum) 5th Infantry Regiment (based in Elverum) 6th Infantry Regiment (based in Hønefoss) 3rd Division – This division had its headquarters in Kristiansand, and was commanded by Major-General Einar Liljedahl. 7th Infantry Regiment (based in Kristiansand) 8th Infantry Regiment (based in Stavanger) 4th Division – This division had its headquarters in Bergen, and was commanded by Major-General William Steffens. 9th Infantry Regiment (based in Bergen) 10th Infantry Regiment (based in Voss) 5th Division – This division had its headquarters in Trondheim, and was commanded by Major-General Jacob Ager Laurantzon. 11th Infantry Regiment (based in Åndalsnes) 12th Infantry Regiment (based in Trondheim) 13th Infantry Regiment (based in Steinkjer) 6th Division – This division had its headquarters in Harstad, and was commanded by Major-General Carl Gustav Fleischer. The division was better prepared for war than any other unit of the Norwegian Army as it had been mobilised and kept on duty during the Finnish Winter War. 14th Infantry Regiment (based in Mosjøen) 15th Infantry Regiment (based at Elvegårdsmoen) 16th Infantry Regiment (based in Tromsø and Bardufoss) During the