1. At that time, Sun Mingjiu, the second lieutenant of the Northeast Army, staged a coup and assassinated Zhang's clearly designated leaders of the Northeast Army and others, resulting in a lack of morale and a unified command. Later, it was gradually suppressed, wooed and divided by the central department of Chiang Kai-shek. Some people voted for Chiang Kai-shek under the command of some old-school generals and obeyed the decrees of the central government. Some people left the main force of the Northeast Army and went to other places to fight their own battlefields. For example, Lv Zhengcao and others led their troops to North China and other places. Others voted for Japan or * * *. Ironically, Sun Mingjiu and others were neither accepted by the nationalist army, nor by the * * * production party, nor by Chiang Kai-shek. Finally, these young people in the Northeast who shouted the loudest anti-Japanese slogans voted for Japan.

Second, at that time, the Northeast Army was actually scattered and not concentrated in one place. When Zhang was detained, Wang was assassinated, and other major generals announced that they would abide by the decrees of the central government, they were all waiting for the reorganization of the central government. At that time, the Northeast Army was in the periphery of the northwest, and Xi 'an and other places were still the territory of the Northwest Army's Yang Hucheng Department. If you can't concentrate, there is no threat. Jiang's central army was blocked near Tongguan and could not get out.

Third, Zhang himself later made a special order, pleading guilty and obeying the law, demanding that his subordinates not act without authorization and obey the central command.