Flags had been regularly used as rallying factors throughout battles; troopers may gather round their colorings for morale

https://lorenzoomka633.fairmontdigest.com/posts/a-closer-look-at-historic-civil-war-flags-what-they-represent

Flags had been in some cases used as rallying elements at some point of battles; soldiers would accumulate around their colorations for morale support while confronted with overwhelming odds.