I learned from John D. Reid’s blog, Canada’s Anglo-Celtic Connections, that Ancestry has added the following Canadian WWI records.
Canada, Ledgers of CEF Officers Transferring to Royal Flying Corps, 1915-1919, 1,210 records
This relatively small database is from the records of the Department of National Defence, RG 24. Library and Archives Canada. The records, typically two pages, include name, address, date of birth, next of kin, the officer’s movements from unit to unit, appointments and promotions, decorations and honours, medical information, and civilian employment.
Read John’s blog post here to find out what else Ancestry recently added to its military collection.