《孙子兵法·火攻篇》主张:“合于利而动,不合于利而止,”《孙膑兵法·见威王》也强调:“事备而后动”。打无准备之仗,打无把握之仗,是违反作战规律的行为,历来为兵家所忌。但是,在平息安史之乱的过程中,由于唐玄宗、肃宗等统治者的错误决策和错误指挥,唐军却接二连三地违反军事规律,导致了潼关、陈陶、相州等战役的惨重失败。作为诗圣的杜甫不仅在自己的诗歌里描绘了这些战役失败给人民造成的苦难,而且对战略、战术问题也提出了自己的看法,具有很高的史学价值和军事价值。《悲陈陶》、《悲青坂》就记载了房琯率唐军与 “The Art of War, Fire Attack,” advocate: “fit to move, not fit for the benefit,” “Sun Bing war Veteran King” also stressed: “preparedness and move.” Fighting unprepared battles and fighting without confidence are acts that violate the laws of war and have always been tabooned to the military. However, in the process of quelling the unrest in the history of Anshun, due to the wrong decisions and wrong commands of the governors such as Emperor Xuanzong and Su Zong, Tang Jun repeatedly violated the laws of the armed forces and caused heavy losses in the battle of Tongguan, Chen Tao and Xiangzhou. Du Fu, as a poet, not only depicted in his own poetry the misery caused by these campaigns to the people, but also put forward his own views on strategic and tactical issues with high historical value and military value. “Sadly Chen Tao”, “Sad Youth” on the record room rate Tang Jun and