Which Cabinet position is responsible for national defense?

The Secretary of Defense is the Cabinet position responsible for national defense in the United States. This role involves overseeing the Department of Defense, which is tasked with ensuring the country's safety, managing military operations, and developing defense policies. The Secretary of Defense advises the President on defense-related matters and leads the military forces, making decisions regarding national security and the deployment of armed services. This position is crucial for maintaining the country's defense posture and responding to global security challenges. Understanding this role highlights the importance of national defense in a stable and secure society.