H&S Co,

Headquarters and Service Company (H&S Co) is a fundamental unit within United States Marine Corps battalions, providing essential command, control, and support functions. Established to facilitate the battalion’s operational effectiveness, H&S Co manages administrative, supply, communications, and logistical services. Throughout its history, H&S Co has supported combat and training operations in major conflicts, including World War II, the Korean War, Vietnam, and recent operations in the Middle East. The company's adaptability and professionalism ensure that battalion commanders can effectively coordinate missions and maintain combat readiness.