He was inspired by his sister Colleen to study early childhood education, and became convinced that teaching preschool children "was my calling". He was also attracted to the profession's freedom, artistic nature, and lack of discipline, which was different from his experience in boarding school. Field put off university when the Cockroaches became successful, but he was dissatisfied with touring and plagued by "perhaps irrational, but very real, feelings of inadequacy and depression". By his mid-twenties, he decided that he did not want to tour any longer, so he took two breaks. His first break was as an infantry soldier, rifleman, stretcher bearer, and ambulance driver in the 5th/7th Battalion, Royal Australian Regiment, Australia's regular army from 1982 to 1985. He played the bagpipes in parades and on training missions, but ended his military service in July 1985 and suffered from a bad back as a result of his training. He also went backpacking in the U.K., listening to roots music, to children's music by artists like Raffi, and to recordings of children's books.