The Ministry of Defence is a government department responsible for coordinating and overseeing a country's military forces and defense policy. It ensures national security by managing the armed forces, including the army, navy, and air force. The ministry also handles defense budgets, procurement of military equipment, and strategic planning. In many countries, the Ministry of Defence works closely with other government agencies and international organizations to address security challenges. It often collaborates with entities like the NATO alliance and engages in peacekeeping missions. The leadership typically includes a Minister of Defence, who is accountable for defense-related decisions and policies.