The Union flag, which is called the Stars and Stripes, symbolized cohesion and patriotism

https://andreioqm655.capitaljays.com/posts/exploring-the-various-civil-war-flags-more-than-just-banners

The Union flag, also known as the Stars and Stripes, symbolized team spirit and patriotism, proposing 13 stripes and a box of blue with stars that represented both kingdom in the union.