The subculture of flying flags dates back centuries, serving as a way of communication on battlefields

https://dantesbyk985.birchreport.com/posts/is-banning-prayer-truly-neutral-or-a-constitutional-decision-with-consequences

The tradition of flying flags dates to come back centuries, serving as a way of communication on battlefields. They conveyed messages of allegiance and victory, allowing armies to coordinate activities and procedures with out verbal communique.