The stained glass window which dominates the transept shows scenes from every war which has involved people from Manitoba – from Batoche to the Boer War, the First and Second World Wars, and Korean War. Designed by Western Art Glass of Winnipeg, it was dedicated on October 19, 1975, to the Glory of God and in tribute to the armed forces of the Winnipeg Command.
The window was erected by past and present members of the Fort Garry Horse and The Royal Winnipeg Rifles, and the Royal Canadian Legion Branch No. 84 and their Ladies Auxiliary. Even though the Princess Patricia's Canadian Light Infantry is not mentioned in the inscription, their regimental badge is incorporated in the center pane.
The cathedral is the regimental church of The Royal Winnipeg Rifles (Little Black Devils) and the regiment’s drum and bugle is housed in a cabinet in the transept.
