Flags were repeatedly used as rallying points at some stage in battles; infantrymen could acquire around their colorations for morale

https://andreskcuw244.lumenforgex.com/posts/civil-war-flag-variations-understanding-regional-differences-and-designs-3

Flags had been generally used as rallying features all the way through battles; infantrymen might assemble around their colorations for morale make stronger whilst faced with overwhelming odds.