The U.S. Department of Defense is America's largest government agency. With the U.S. military tracing its roots back to pre-Revolutionary times, the department has grown and evolved with the nation. The DOD's mission is to provide the military forces needed to deter war and ensure the nation's security.

The Federal Ministry of Defence assists the Federal Minister of Defence in fulfilling his responsibilities as a member of the Federal Government, as the head of the ministry and as commander in chief of the armed forces.

The Defense Security Cooperation's mission is to advance U.S. national security and foreign policy interests by building the capacity of foreign security forces to respond to shared challenges. DSCA is the Marshall Center’s higher headquarters. Marshall Center’s sister DOD Regional Centers are: Daniel K. Inouye Asia-Pacific Center for Security Studies; William J. Perry Center for Hemispheric Defense Studies; Africa Center for Strategic Studies; Near-East South Asia Center for Strategic Studies; Ted Stevens Center for Arctic Security Studies  The DoD Regional Centers for Security Studies are international venues for bilateral and multilateral research, communication, exchange of ideas, and training involving U.S. and foreign military, civilian, and nongovernmental participants, utilizing their unique academic forums to build strong, sustainable international networks of security leaders.

The United States Department of State, or State Department, is an executive department of the U.S. federal government responsible for the nation's foreign policy and international relations.

U.S. European Command is one of 11 combatant commands that make up the U.S. military. USEUCOM is responsible for U.S. military operations across Europe, as well as portions of Asia and the Middle East, and the Arctic and Atlantic Oceans.

The U.S. Central Command directs and enables military operations and activities with allies and partners to increase regional security and stability in support of enduring U.S. interests.

The U.S. Africa Command, with partners, counters transnational threats and malign actors, strengthens security forces and responds to crises in order to advance U.S. national interests and promote regional security, stability and prosperity.

Founded in 1999 during the NATO Summit, Partnership for Peace Consortium of Defense Academies and Security Studies Institutes is an international security cooperation organization of more than 800 defense academies and security studies institutes across 60 countries.