Career
Knowles served in Number. 111 Squadron in Palestine, part of 40th (Army) Wing, in the Egyptian Expeditionary Force during the Sinai and Palestine Campaign. Between 12 December 1917 and 18 January 1918 while flying as observer/gunner to a number of pilots, he accounted for seven enemy aircraft, all but one destroyed.
Confirmed victories are numbered and listed chronologically.
Unconfirmed victories are denoted by "u/c" and may or may not be listed by date.
