 In the 1975 Spring Offensive, Major General Nguyen Huu An was Commander of 2nd Corps ("Hương Giang").2nd Corps, under his command, successively captured Quảng Trị and Huế; and in combination with armed forces of Military Region No.5 defeated nearly 100,000 regular troops of the ARVN within just 3 days at Da Nang.He then commanded the entire corps to march along nearly 1000 km to engage in the Ho Chi Minh Campaign after having destroyed the ARVN defensive line in Phan Rang.