On 1 July 1983, the regiment was amalgamated in Sollefteå Army Garrison (Sollefteå armégarnison, SAG), which was a pilot organization, consisting of Västernorrland Regiment (I 21), the defence district staff (Fo 23), Ådal Brigade (Ådalsbrigaden, IB 21), Ångermanland Brigade (Ångermanlandsbrigaden, NB 51) and Norrland Logistic Regiment. On 30 June 1990, the pilot organization was disbanded and from 1 July 1990, Västernorrland Regiment became an independent unit again. However, the defence district staff came to form its own authority. Through Defence Investigation 88, it was clear that four brigade-producing regiments would be disbanded. The background was that the economic problems that arose in the Swedish defence during the 1970s and 1980s remained and were not solved in connection with the Defence Act of 1987. The Carlsson I Cabinet therefore requested a new investigation from the Supreme Commander of the Swedish Armed Forces, General Bengt Gustafsson, the Defence Investigation 88 (FU 88), on the army development. The investigation led to the Riksdag in December 1989 deciding that the army from 1 July 1992 would be reduced by 11 brigades and consist of 18 brigades. The brigades that were disbanded were all organized according to IB 66M, which among other things concerned the Ådal Brigade (Ådalsbrigaden). Furthermore, it was also decided that Norrland Logistic Regiment would be co-located with Västernorrland Regiment and thereby concentrate the Sollefteå Garrison on Regementsvägen in Sollefteå.
