Befalsskolen for Infanteriet i Sør-Norge

BSIS was established by royal resolution in the autumn of 1945 to serve as the new infantry officer training school in the south of Norway.

The new government formed by Einar Gerhardsen on 25 June 1945 had immediately initiated a comprehensive review of Norway's military capability after the end of hostilities with Germany on 8 May 1945.

The inland climate at Heistadmoen, ranging from -30 °C in winter to 30 °C in summer, was also ideal for infantry training in harsh weather conditions.

In August 2001, Telemark Infantry Battalion was moved to Rena base in Hedmark, which was also home of the cavalry and airborne forces in the south of Norway.

Heistadmoen is today under administration by the Norwegian Home Guard and activity is much reduced from the 1990s with part of the base area redeveloped for civilian use.