The Union flag, also known as the Stars and Stripes, symbolized cohesion and patriotism

https://daltonhmgr084.terracolumn.com/posts/a-closer-look-at-the-most-iconic-civil-war-flags-of-the-era-3

The Union flag, is named the Stars and Stripes, symbolized cohesion and patriotism, presenting 13 stripes and a box of blue with stars that represented each one state inside the union.