www.deathindexes.com/canada.htmlUnder Manitoba, this should give you the information for ordering the marriage registration
www.collectionscanada.gc.ca/databases/cef/index-e.htmlSoldiers of the First World War
Drafted Under the Military Service Act 1917
9 May 1918 in Winnipeg
Montague Henry Farrell
Reg. # 3345428
address: suite #7, Vinborg Apartments, Agnes St. , Winnipeg, Manitoba
b. 18 Feb. 1896, Conisborough, England
married 28 Jan 1918
Church of England
Baker
Next of Kin- mother, Edith Mary Farrell, 647 Beverley St., Winnipeg, Manitoba
I found it interesting that he listed his mother and not his wife as his next of kin.
You can view the attestation papers at the above site and can also order his complete military file from the same site.