The Union flag, called the Stars and Stripes, symbolized team spirit and patriotism

https://mariohczd240.nexorafield.com/posts/the-legacy-of-civil-war-flags-symbolism-and-design-throughout-history-2

The Union flag, is called the Stars and Stripes, symbolized cohesion and patriotism, proposing 13 stripes and a discipline of blue with stars that represented each one kingdom inside the union.