On 25 May a second North Vietnamese assault managed to cross the My Chanh River, but ARVN defenders put up ferocious resistance, forcing their enemy back across on 29 May. This was the last serious assault on the defenses of Huế. Major General Frederick J. Kroesen, senior U.S. advisor in I Corps, believed that the fall of Quảng Trị should have heralded the fall of Huế, but the North Vietnamese did not exploit their opportunity quickly enough. "That he failed completely to take advantage of the moment must be classed as another great blunder of the Quảng Trị campaign."