I’m glad your Dad made it back home. How old was he when he was fighting in France? My uncle was 25 when he died. I’ve got a picture of him in uniform on horseback. Not sure where it was taken, at training in Canada, or once he got overseas. He was the only boy and had two sisters. One was my grandmother who I never got to know because she died before I was born. My mother wasn’t born until 1920, and all she ever knew about him was that he was buried in Flanders Field. After she passed I traveled to Canada to find out more about her side of the family, and I’m glad I did. It filled in a lot of blanks, but there’s still a few more blank spaces that may never be filled.
I too have pictures of him in uniform. He was a Corporal, Company K, 320th Infantry. I have his dog tag and his whistle.
There is an organization that maintains records of soldiers, National Personnel Records Center,St Louis, Mo. Of course, they have records for American soldiers. I don't know about Canadians, but they were very helpful to me.