What was the nickname of the General of The Twelfth United States Army Group?
Twelfth United States Army Group:  It was commanded by General Omar Bradley with its headquarters established in London on 14 July 1944. Omar Bradley: General of the Army Omar Nelson Bradley (February 12, 1893 – April 8, 1981), nicknamed "Brad", was a highly distinguished senior officer of the United States Army during and after World War II.
i don't know