What is the mission of the Department of Defense?

• A. Promote international trade.
• B. Provide military forces to deter war and protect the security of our country.
• C. Regulate domestic law enforcement.
• D. Manage space exploration.

Answer: (B)

The mission of the Department of Defense is to provide military forces to deter war and protect the security of our country. This means maintaining ready, capable forces and planning to respond to threats so that potential aggressors are discouraged from attacking and the nation can defend itself if deterrence fails. The focus is on national defense, readiness, crisis response, and sustaining strategic advantages through alliances and force projection.

Other options don’t fit because promoting international trade falls under economic policy and commerce; regulating domestic law enforcement is the realm of civilian justice and homeland security agencies; and managing space exploration is primarily the domain of civilian space programs, with DoD handling defense-related space operations rather than exploration.