In the United States armed forces, each branch of service has its own supply corps.
The United States Army refers to the organization as the Quartermaster Corps while the U.S. Navy operates a group known as the Navy Supply Corps.
In most militaries, the Supply Corps are considered staff officers meaning that they have no command authority over troops in the field or ships at sea.
In the modern age, however, some logistics commands (such as Commander Naval Logistics Forces Korea) have such a forward deployed manpower base that they are considered equal to front line combat units.
e.g., securing supplies, materials and equipment required by for combat units.