^^ What he said. Every camp and council has its own unique uniform patch that they make, and many change every year (if only in the year numbers shown on the patch sometimes.) Many scouts will buy as many patches as they can from local camps, and then trade those for more exotic patches to other scouts from distant lands, such as Canada, or Oregon, or Vermont, or Texas, or Japan. My own patch collection is pretty pathetic, but some of the boys manage to gather multiple hundreds of patches from all over the scouting world.