What role does the DOD have in relation to deterring and preventing attacks on the US?

The Department of Defense (DOD) plays a leading role in deterring and preventing attacks on the U.S. This involves a comprehensive approach that encompasses various strategies, including military readiness, intelligence gathering, and conducting operations that may thwart potential threats before they materialize. As the primary military organization, the DOD is responsible for setting the strategic defense posture of the nation, thereby acting as the main actor in safeguarding national security.

Leadership in deterrence means that the DOD is at the forefront of formulating policies, directing military assets, and planning operations that aim to signal U.S. resolve and capabilities to adversaries. This leadership role also involves working alongside other government agencies to ensure that the nation's defense strategies are cohesive and effectively address threats.

While assisting, supporting, or coordinating with other entities are important functions, they typically fall under the purview of the DOD in its leadership capacity, where it establishes the overarching strategy to deter attacks and protect the homeland. This differentiation highlights the DOD's comprehensive responsibility as the principal defense leader, tasked with anticipating and preventing potential military threats.