Flags have been repeatedly used as rallying facets for the time of battles; squaddies could collect round their colours for morale

https://daltonhmgr084.terracolumn.com/posts/reenactor-spotlight-interviewing-those-who-love-their-civil-war-flags

Flags were repeatedly used as rallying elements for the period of battles; troopers may accumulate around their colors for morale toughen when confronted with overwhelming odds.