 Complete the following phrase:  He later returned to military service during the First World War, initially serving as a lieutet in the Essex Regiment, before transferring to the Manchester Regiment. He was promoted to captain in November 1916, with seniority antedated to October of the same year. Airy was temporarily promoted to major in December 1917, while in March of the following year he was appointed an acting lieutet colonel while commanding a battalion. Serving throughout the war, he saw action in Egypt and 