The State Department deals with diplomacy while the Department of Defense affiliated with the military.
No. The Secretary of State is the head of the State Department. The Secretary of Defense is head of the Defense Department.
Yes, it is a Cabinet department
Secretary of the Department of Defense - Robert Gates Secretary of State - Condoleezza Rice
The United States Department of State (often referred to as the State Department), is the United States federal executive department responsible for international relations of the United States,...