The Mexican Secretariat of National Defense (, SEDENA) is the government department responsible for managing Mexico's Army and Air Forces. Its head is the Secretary of National Defense who, like the co-equal Secretary of the Navy, reports directly to the President. Before 1937, the position was called the Secretary of War and Navy (Secretaría de Guerra y Marina). The agency has its headquarters in Lomas de Sotelo, Miguel Hidalgo, Mexico City. The following offices report to the Secretary are the assistant secretary, the chief of staff and the military law bodies.