1939-45 WW2. Urgent Appeal Poster Government direct appeal to women. Important.. 200000 Urgently Needed in the A.T.S now ! The Auxiliary Territorial Service was the women's branch of the British Army during World War II The Auxiliary Territorial Service ATS was the women's branch of the British Army during the Second World War. It was formed on 9 September 1938, initially as a women's voluntary service, and existed until 1 February 1949, when it was merged into the Women's Royal Army Corps.

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