Defence Regulation 18B, often referred to as simply 18B, was one of the Defence Regulations used by the British Government before and during the Second World War. The complete name for the rule was Regulation 18B of the Defence (General) Regulations 1939.
Defence Regulation 18B, often referred to as simply 18B, was one of the Defence Regulations used by the British Government before and during the Second World War. The complete name for the rule was Regulation 18B of the Defence (General) Regulations 1939.
Source: Wikipedia "Defence Regulation 18B" · CC BY-SA 4.0
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