sentences:  The parade has been cancelled only ten times in the past during both world wars and the Vietnam War.In 1942, the parade was billed as "the largest parade in the world" at 2 miles long and featuring 170 cars and floats.In addition to the formations included as part of its pregame show, the Minnesota Marching Band is known for its traditional "Mound of Sound", a halftime drill formation where, as described by the announcer, they "put a really big band in a really small circle."