The Republic of Vietnam Military Forces (RVNMF; Vietnamese: Quân lực Việt Nam Cộng hòa – QLVNCH), were the armed forces of the Republic of Vietnam and were responsible for the defence of the country from 8 December 1950[2][3] to 30 April 1975.[5] Created out from ex-French Union Army colonial Indochinese auxiliary units (French: Supplétifs), gathered earlier in January 1949 into the French-led Vietnamese National Army or VNA (Vietnamese: Quân Đội Quốc Gia Việt Nam – QĐQGVN), Armée Nationale Vietnamiènne (ANV) in French, the armed forces of the new state consisted in the mid-1950s of ground, air, and naval branches of service, respectively, the Republic of Vietnam Military Forces day is also celebrated (mostly by the overseas Vietnamese people) every years in 19 June Their roles were defined as follows: to protect the sovereignty of the Vietnamese nation and that of the Republic; to maintain the political and social order and the rule of law; to defend the newly independent Republic of Vietnam from external (and internal) threats; and ultimately, to help reunify Vietnam – divided since the Geneva Accords in July 1955 into two transitional states, one at the north ruled by Ho Chi Minh’s Lao Dong Party regime and the other in the south under Ngô Đình Diệm's authoritarian regime.The Republic of Vietnam Military Forces consisted of four military corps (Quân đoàn) as follows: I Corps headquartered in Da Nang, included five provinces: Tactical zone 11, including 2 provinces Quang Tri and Thua Thien Tactical zone 12, including 2 provinces Quang Tin and Quang Ngai Quang Nam Special Zone, including Quang Nam Province and Da Nang City II Corps headquartered in Nha Trang, but the 2nd Army Corps Command is located in Pleiku (had to move to Nha Trang from mid-March 1975), included 12 provinces: Tactical Zone 22, including 3 provinces Binh Dinh, Phu Yen, Phu Bon Tactical Zone 23, including 7 provinces Darlac, Khanh Hoa, Ninh Thuan, Binh Thuan, Tuyen Duc, Quang Duc, Lam Dong and Cam Ranh city Special area 24, including 2 provinces Kon Tum and Pleiku III Corps headquartered in Bien Hoa, include 10 provinces: Tactical Zone 31, including 3 provinces Tay Ninh, Hau Nghia, Long An Tactical zone 32, including 3 provinces Phuoc Long, Binh Long, Binh Duong Tactical Zone 33, including 4 provinces Binh Tuy, Phuoc Tuy, Long Khanh, Bien Hoa and Vung Tau city Capital Military District of Saigon - Gia Dinh IV Corps headquartered in Can Tho, included 16 provinces: Dinh Tuong tactical zone, including 4 provinces Kien Tuong, Dinh Tuong, Go Cong, Kien Hoa Tactical Zone 41, including 7 provinces Kien Phong, Chau Doc, Vinh Long, Vinh Binh, An Giang, Kien Giang, Sa Dec Tactical Zone 42, including 5 provinces Phong Dinh, Chuong Thien, Ba Xuyen, Bac Lieu, An Xuyen On July 1, 1970 the four Corps were redesignated as Corps Tactical Zones (CTZs).[6] The nation's officer corps still suffered from the promotion and retention of generals due to their political loyalties, not their professional abilities.You need men that will fight... You’ve got all the equipment you need... You lost most of your artillery because it was abandoned.”[8] President - Supreme Commander-in-chief : Ngo Dinh Diem Minister of National Defense : Ngo Dinh Diem Chief of the Joint General Staff : Chief of State - Supreme Commander-in-chief : Commander-in-chief Minister of National Defense : Chief of the Joint General Staff : President - Supreme Commander-in-chief : Minister of National Defense : Chief of the Joint General Staff :