Medals
Awarded during WWI (from http://www.veterans.gc.ca/eng/remembrance/medals-decorations/orders-decorations)

Victoria Cross
George Cross (none in DB yet)
Commander of the Order of the British Empire (CBE)
Distinguished Service Order (DSO)
Officer of the Order of the British Empire (OBE)
Member of the Order of the British Empire (MBE)
Royal Red Cross Class 1 (RRC)
Distinguished Service Cross (DSC)
Military Cross (MC)
Distinguished Flying Cross (DFC)
Air Force Cross (AFC)
Royal Red Cross Class 2 (ARRC)
Distinguished Conduct Medal (DCM)
Conspicuous Gallantry Medal (Naval) (CGM)
George Medal (GM) (none in DB yet)
Distinguished Service Medal (DSM)
Military Medal (MM)
Distinguished Flying Medal (DFM)
Air Force Medal (AFM) (None in DB yet)
British Empire Medal (Military and Civil) (BEM) (None in DB yet)

Others recommended by Jim:
Croix de Guerre (Belgium)
Croix de Guerre (France)
Cross of Military Merit 3rd Class (Bavaria)
Knight Commander of the Order of the British Empire
Member of the Order of the British Empire
Officer of the Order of the British Empire (OBE)

26 total. Approved by Jim. in notes section. Finished flagging appropriate medals as Approved by Jim 6-9

Note: There are two medals flagged as Unclear (Conspicuous Gallantry Medal and Royal Red Cross) that do not specify which of the two medals they are, but both belong on the approved medal list.