In the upcoming invasion of France in May 1940 his 7th Panzer Division would become known as the `` Ghost Division '' , called this because its fast paced attacks and rapid advances often placed it so far forward that their actual position was not known , and they were frequently out of communication with the German high command .
In May , 1940 his 7th Panzer Division became known as the `` Ghost Division '' because its rapid advances and fast paced attacks often placed them so far forward that they were frequently out of communication with the rest of the German army .