Young animals learn hunting and survival behavior from observing their parents, then by taking those observations and applying them in play with their peers. By the time the youngsters reach adulthood, their skills have already been honed and they’re ready to strike off on their own.
Young soldiers in the Army are much the same way. We go to these classes – first aid, urban operations, checkpoint operations, and the like – and when we return to the barracks, it’s an inevitable parade of new acronyms, buzzwords, and movement techniques as we walk to chow or around the bay.
This realization struck me after urban operations: the next day, we were going down the stairs, and everyone yelled out, “stack four!” and we lined up against the wall holding imaginary rifles in our hands.
Just a little ridiculous parallel with the wild world for you.