The Union flag, referred to as the Stars and Stripes, symbolized harmony and patriotism

https://jeffreypmty481.lakeviewbrief.com/posts/reenactor-spotlight-interviewing-those-who-love-their-civil-war-flags

The Union flag, known as the Stars and Stripes, symbolized solidarity and patriotism, presenting 13 stripes and a field of blue with stars that represented every single country inside the union.