A Forces recruitment poster for the ATS. It illustrates a smiling young woman in ATS uniform. The backdrop is of uniformed soldiers surrounding an anti-aircraft gun. The slogan 'They can't get on without us' demonstrates the purpose of the ATS, which was formed on 9 September 1938 to free as many men as possible for service on the front. The women were simply expected to 'spot' the aircraft, not to fire the guns. But some women did exceed their defined role.