The Lê Duẩn faction, which favoured quick, decisive offensives meant to paralyse South Vietnam-United States responses, was replaced by Giáp and Trường Chinh, who favoured a strategy of more protracted, drawn-out conventional warfare. High-intensity, conventional big-unit battles were replaced with smaller-scale, quick attack and quick withdrawal operations to continually put pressure on the allied forces at the same time that mechanised and combined-arms capabilities were being built. The plan for a popular uprising or people's war was abandoned for a greater combination of guerrilla and conventional warfare. During this period, the PAVN would undergo a significant strategic re-structuring, being built into a combined-arms capable force while continually applying pressure on the U.S./ARVN with lighter infantry units. In line with the revamped strategy of Hanoi, on April 5, 1969, COSVN issued "Directive 55" to all of its subordinate units: "Never again and under no circumstances are we going to risk our entire military force for just such an offensive. On the contrary, we should endeavor to preserve our military potential for future campaigns."