Canada 1945 WWII RCAF Return to Sender REPORTED KILLED Military Cover

Cover franked with 4c KGVI, tied by slogan blackout cancel (Mar 5), return address of Quebec, to a Sgt. Beaudry with the Royal Canadian Air Force, address crossed-out and handstamped REPORTED KILLED, affixed with RETURN TO SENDER label "…the Postmaster General deeply regrets the circumstances which make this necessary," backstamped Canadian Overseas Postal Depot (19 MAR) and MPO 304.