sentences:  Chiang had ordered the Nationalist air force and navy to provide support, but without giving any authority to commanders on the ground to use them directly; even Que Hanqian and Luo Qi could not direct air and naval assets without going through Chiang first.As a result, Nationalist naval shelling and air strikes were not coordinated with ground offensives to any great effect.Another reason for ineffective Nationalist air and naval operations was that all Nationalist officers, including Chiang himself, had doubts as to the success of the mission, and the Nationalists were faced with a dilemma