The battalion served in the African Theatre of the war from 1915–1918, centered mostly in the area around Lake Tanganyika, British East African and German East African territory. The battalion was largely composed of older men who hailed from diverse backgrounds and varied occupations, some of whom were Boer War veterans. Amongst these occupations were English big-game hunters, a British millionaire, several American cowboys, a Scottish light-house keeper, a naturalist, a circus clown, an Arctic explorer, an opera singer, a famous photographer, and a lion tamer. There were also French Foreign Legionaries and Russians (reportedly prison escapees from Siberia).