Flags were on occasion modified inside the box; troopers could upload patches or symbols to represent victories or losses that

https://jasperzvnb828.dovetailscope.com/posts/connecting-generations-through-history-teaching-kids-about-civil-war-flags-2

Flags had been oftentimes changed within the container; soldiers could upload patches or symbols to symbolize victories or losses that marked their unit's ride by means of conflict.