It encompassed the capital Saigon and the five adjacent districts of Gia Định province.

The Capital Military District (CMD) had its headquarters at Camp Lê Văn Duyệt.

[1] Prior to 7 June 1966 the CMD was called the Capital Military Region and technically was coequal with a corps tactical zone (CTZ).

[2]: 24 MACV retained a separate advisory detachment for the CMD known as the Capital Military Assistance Command (CMAC).

[2]: 57 In June 1965 the CMD controlled five battalions of troops, two used for security operations, two in reserve and one in training.