This should help
color guard
–noun the group of persons, as in the armed forces or at military institutions, who carry or escort the flag or colors during parades, reviews, etc
IT WAS AMAZING!!!!!! ... a dream come true!!! ...just to see Float's reaction was worth it! We worked very hard to represent The Kingsmen in the best possible way. From where I was (center of the snareline) it sounded like the crowd was diggin it!