When did Richard Minifie join the main theatre of war during the First World War?
Richard Minifie:  Accepted for flight training, he completed his instruction in December and joined No. 1 (Naval) Squadron RNAS on the Western Front in January 1917, flying Sopwith Triplanes. Western Front (World War I): The Western Front was the main theatre of war during the First World War.
i don't know