" Likewise, by expanding the size of their formation as far as the terrain and visibility would allow whenever they were out of actual contact with the enemy, they increased the likelihood that when they did make contact, the flanks of their formation would be wider than the enemy’s position. Like a rugby team playing a running game, their entire approach—the tempo and flow of the way they moved and fought—was designed around creating and exploiting a series of these overlaps. "

― David Kilcullen , Out of the Mountains: The Coming Age of the Urban Guerrilla