This regulation prescribes policy and assigns responsibilities for the U.S. Army’s acquisition and use of foreign host nation military, paramilitary, civilian, equipment, services, and facilities support to supplement, augment or satisfy U.S. Army combat support and combat service support requirements overseas during times of crisis, transition to war, and wartime. It pertains to all wartime host nation support based upon agreements mutually concluded between nations and acquired for use during all phases of the campaign. This regulation integrates U.S. Army WHNS policy with U.S. Army International Activities policy.