What are the roles of the Department of Defense?

The Department of Defense (DoD) is responsible for overseeing the nation's military forces and ensuring national security. Its primary roles include defending the country against external threats, conducting military operations, and supporting international peacekeeping efforts. Additionally, the DoD plays a crucial role in strategic planning, resource allocation, and coordination with other government agencies and allies. It also focuses on personnel management, training, and readiness of military forces.