The lifestyle of flying flags dates to come back centuries, serving as a means of conversation on battlefields

https://deanafoi823.currentvale.com/posts/are-we-teaching-kids-to-be-proud-of-america-or-afraid-to-show-it

The custom of flying flags dates back centuries, serving as a means of verbal exchange on battlefields. They conveyed messages of allegiance and victory, allowing armies to coordinate activities and strategies with no verbal verbal exchange.