National Service (Armed Forces) Act 1939
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The National Service (Armed Forces) Act 1939 was enacted immediately by the Parliament of the United Kingdom on the day the United Kingdom declared war on Germany on 3 September 1939, at the start of the Second World War. It superseded the British Military Training Act passed in May that year, and enforced full conscription on all males between 18 and 41 resident in the UK.[1] It was perpetuated into peacetime by the National Service Act 1948.