McNair was a US General who specialized in developing training systems. In 1940 McNair was made Chief of Staff at the US Army General Headquarters and set about extending the training methods. He wanted the ordinary soldier to know more about the conditions which faced him in battle. Men were sent out on exercises which fully simulated battle conditions and were trained to act as a formation. McNair was killed when Allied aircraft accidentally bombed the unit he was visiting in Normandy.
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