On 20 March, 1919, the Regiment was selected to form part of Canada's "peace-time" army to be called the Permanent Active Militia, more commonly known as the Permanent Force.  The Regiment's headquarters, "A" and "D" Company were located at Fort Osborne Barracks in Winnipeg, Manitoba in April, 1920.  "B" Company was located at Esquimalt, British Columbia.

        The years between the wars were lean ones for the Canadian Militia, both Permanent and Non-permanent.  It was a period of official neglect and ever decreasing establishments.  By 1924 the Regiment had been reduced to 209 all ranks.  Patricias were concentrated at Sarcee Camp, Alberta, to carry out battalion training on only four occasions during these twenty years.

        Each summer the Winnipeg companies went to camp, first to Camp Hughes and later to Camp Shilo to carry out company training.  On the west coast, "B" Company trained at Heal's Range and other points on southern Vancouver Island.

        Each year the Regiment was called on to provide instructors and to conduct qualifying courses for officers and non-commissioned officers of the Non-permanent Active Militia.  Instructors were also provided for contingents of the Canadian Officers Training Corps at the universities of British Columbia, Alberta, Saskatchewan and Manitoba.