. While steady combat action occupied the men on the perimeter, the Headquarters troops had been busy organizing their different sections. Too often these routine jobs, so highly important to the success of an operation, are overlooked because of the more spectacular interest of the fighting itself. In a parachute regiment it is particularly interesting to observe the speed with which the intricate and technical specialist departments can be set up, and to see how rapidly a group of 2000 scattered men, dropped out of the sky, can establish a central command post. Until this nerve center of the regiment begins to function, paratroopers are nothing but loose bands of guerrillas, serving to harass the enemy, or for independent, small-scale demolition raids. The larger, tactical success of paratroops had grown from their ability to organize into a fully unified, completely maneuverable, swiftly striking combat team. This involves the integration of all infantry units, rifle platoons, machine gun and mortar and demolition sections, heavy weapons, artillery support, engineers, and air and naval liaison. Because of the localized nature of the action at Corregidor, it was essential from the very start to develop efficient coordination, and from the very start this was accomplished in a way which led to immediate mastery of the whole situation.