I doubt that you have studied Korean war history carefully. DHave you seen any photo showing how Chinese army was slaughtered by 凝固汽油弹? it was so sad, so terrible.
Also, if you have read 彭德怀回忆录, you would have known that 彭德怀's most regret in Korean war was that he was unable to 全歼营以上建制单位的美军。Because, everytime 美军在飞机的掩护下，以坦克为核心，构成了一个环形阵地，固守待援 and实施突围行动
