2-81. In multinational operations, sustainment of forces is primarily a national responsibility. However, relations between the United States and its NATO allies have evolved to where sustainment is viewed as a collective responsibility (NATO Military Committee Decision 319/1). In multinational operations, the multinational commander must have sufficient authority and control mechanisms over assets, resources, and forces to effectively achieve the mission. Nations performing their own and separate sustainment functions would prove to be inefficient and expensive. It would also hinder the multinational commander’s ability to influence and prioritize limited resources to support the operation and accomplish the mission.