RAUSI began life as “The Alberta Military Institute” in 1920. In 1947, it became “The Alberta United Services Institutes”, and finally, the prefix “Royal” was added in 1979.

Since 1920, the Institute has been located at the Mewata Armoury in Calgary, sharing the Officers’ Mess with the various units headquarters in the building. The purpose of the Institute has always included the provision of the support to the Regular and Reserve Units, as well as the Cadets and Veterans.

Over the years, RAUSI has provided funds for Reserves, bursaries, Cadet Corps, facility upgrading, and veterans groups. In addition, RAUSI has assisted with special military commemorative services, and provides a library now housed at the Museum of the Regiments.