Early 20th century pics 8-17

This is my paternal grandfather when he was about 17 after he had enlisted in the Canadian army during World War I. All the rest of these pictures are all somewhere between 1916 and 1920. I haven't had time yet to match up dates to the pictures. He had written a wonderful narrative for an English assignment in college that covers these years. It is wonderful to have all this technology today to make it easier to share stuff like this. Both my father's parents were born Canadian. They came to America in the very late 20's.