Before we get too deep into the topic of Gamification, let's get some context by looking back in time to the American Civil War.
Legend has it, in the summer of 1862, the Army of the Potomac's Third Corps Commander, General Philip Kearny stumbled upon a group of Union officers lounging under a tree. Being a strict disciplinarian and assuming the men were part of his own regiment, he immediately started to chastise them for their laziness.
The men immediately jumped to attention, and after Kearny finished his rant, one of the men meekly raised his hand and pointed out that they were not actually part of his brigade.
Kearny immediately turned into the proper gentleman and apologised. He stated that he would take steps to ensure he could recognise his own men hereafter, coming up with a simple solution in having his soldiers place a piece of red cloth on the front of their caps.
This simple uniform augmentation became known as the "Kearny patch", and it proved such a successful tool for commanders that within the year, Major General Joseph Hooker ordered the entire eastern army to adopt it.