The collection consists of photographs of the Rocky Mountain Rangers militia regiment and various other units of the Canadian Army and the Canadian Armed Forces at peace time and during World War I and II. Collection includes individual and group portraits and photographs of regimental activities and facilities, as well as scenes of Kamloops and area and of the Vernon Training Camp of the Canadian Army.

The fonds consists of Terence Upton's correspondence as secretary of the Rocky Mountain Rangers Association and his correspondence regarding his personal research which resulted in a history of the Rangers. Fonds includes some early records of the Rocky Mountain Rangers as well as photographs.

The fonds consists of the letterbook of William Holmes with carbon letters relating to the unification of the Rocky Mountain Rangers as the 102nd Regiment.