IV Corps tactical zone

Corps tactical zone boundaries

During the Vietnam War, the IV Corps tactical zone (IV CTZ) was an Army of the Republic of Viet Nam organization with geographic responsibility for the Mekong Delta provinces, including much of the classic area of Cochin China less the Saigon area.

IV CTZ headquarters was at Can Tho. There was no regular U.S. tactical counterpart organization, although there was a senior advisor at Can Tho.

Provinces within the zone were:

Provinces in IV CTZ

1965 name	Capital	Current name
Kien Tong Province
Kien Phong Province		Dien Thap Province
Chau Doc Province
An Giang Province
Ba Dec Province		Ba Ria-Vung Tau Province
Vinh Long Province		Vinh Long Province
Phong Dinh Province		Can Tho Province
Da Xuyen Province
Kien Giano Province
Chuong Thien Province		Can Tho Province
Bac Lieu Province		Bac Lieu Province
An Xuyen Province		Ca Ma Province
Kien Giang Province

While the area was the agricultural heart of Vietnam, and the key rice-growing area, it was generally not a site of major military engagements. The larger battles were between ARVN/US forces and Communist forces operating from Cambodia.