1969年10月,根据林彪的第一个号令(即“一号命令”),从10月18日开始,全军实施紧急疏散,进入临战准备状态。全军进入临战状态后,没有马上发生预想的苏军大规模入侵的情况。但中央军委考虑到中苏继续处于紧张的对立状态,谈判处于僵持局面,尤其入冬以后江河冰封,有利于苏军大规模坦克机械化集群机动,仍然随时存在着发生苏军入侵的危险,决定全军在一个时期内要保持战备状态。 In October 1969, according to the first order of Lin Biao (that is, “Order No. 1”), starting from October 18, the entire army conducted an emergency evacuation and entered a state of ready readiness. After the army entered the state of war, no immediate Soviet invasion was expected to take place immediately. However, the Central Military Commission took into account that China and the Soviet Union continue to be in a state of tension and confrontation. The negotiations are at a standstill. In particular, after the winter, rivers and ice are conducive to the large-scale mechanization of the Soviet Union’s tank mechanization. At any time there is still the danger of a Soviet invasion and the decision The entire army must maintain its readiness during a period of time.