Cyril P. Callister Cyril P. Callister Cyril Percy Callister (16 February 1893 – 5 October 1949) was an Australian chemist and food technologist who developed the Vegemite yeast spread. The son of a teacher and postmaster, and one of seven children, he attended the Ballarat School of Mines and later won a scholarship to the University of Melbourne. He gained a Bachelor of Science degree in 1914 and a Master of Science degree in 1917. In early 1915, Callister was employed by food manufacturer Lewis & Whitty, but later that year he enlisted in the Australian Imperial Force. After 53 days, however, he
Daddy, what did you do in the Great War? Daddy, what did you do in the Great War? "Daddy, what did YOU do in the Great War?" was a British recruitment poster from 1915. It was released by the Parliamentary Recruiting Committee. A war recruitment poster from the First World War shows a daughter posing a question to her father, "Daddy, what did YOU do in the Great War?" There was an extensive recruitment campaign in Great Britain during World War I. Recruitment for World War I was different from prior wars, which had been fought by the regular (professional) army. Samuel Hynes writes that the war was fought