Normally the shock troops will work by companies. They will be instructed to get in touch with neighboring units, probably battalions or regiments, as soon as possible. After accomplishing their initial task, they will be instructed to join up with, and take orders from the higher units which have subsequently descended. For this, radio communication will be essential. It should be noticed that glider-borne troops, though technically "air-landing" troops, operate in close conjunction with parachute troops. Having their arms with them, and not being dispersed, they are able to go into action even more quickly than parachute troops.