The military are the first users of the GNSS signal, back in the 90s of the previous century the aircraft and land vehicles were equipped with GNSS receivers to know their position. And of course of their friends or foes. Today these systems are not only used for equipment, also the soldiers are carrying GNSS receivers to get a complete picture of the battlefield. Besides that tactical radios using the GNSS codes for informing all personnel. Even getting the very much needed supplies to the personnel at the battlefield is relying on the GNSS signal. Payload drops from transport planes receive the GNSS inside the aircraft, so no second is lost once the payload leave the aircraft and find his way, guided by GNSS, to the troops.