II Corps tactical zone

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Corps tactical zone boundaries

During the Vietnam War, the Army of the Republic of Viet Nam (ARVN) defined II Corps tactical zone (II CTZ)[1] as central Vietnam, including both the lowlands and the Central Highlands. It covered nearly half the land area of South Vietnam.

Provinces in II CTZ
1965 name 1965 Capital Current name
Quang Ngai[2] Quang Ngai Quang Ngai Province
Kontum Kontum Kontum Province
Binh Dinh Province Qui Nhon Binh Dinh Province
Phu Bon Pleiku Gia Lai Province
Dac Lac Province Ban Me Thuot Dac Lac Province (also Dar Lac)
Khanh Hoa Province Nha Trang Khanh Hoa Province
Quang Duc Province Nghia Dac Lac Province
Phu Yen Province Tuy Hoa Phu Yen Province
Tuyen Duc Province Dalat Lam Duc Province

North Vietnamese equivalents

U.S. equivalents

Conventional American forces in II CTZ were under I Field Force Vietnam, headquartered at Nha Trang. 5th Special Forces Group headquarters were also in Nha Trang, along with their ARVN counterpart, the LLDB.


  1. Corps is usually a tactical, rather than geographical structure; the U.S. renamed its Vietnam War corps formation s "field forces" to avoid confusion. In July 1970, the Republic of Vietnam redesignated its CTZs as Military Regions (MR). ARVN MR numbers, however, had no relationship to the People's Army of Viet Nam's MR numbering scheme.
  2. Also in I CTZ