在解放战争时期,第四野战军是我军五大主力之一,百万之众,兵强马壮,为打败国民党军立下不可磨灭的卓著功勋.四野发展壮大之迅速,战斗力之强大,举世公认.其中,除了中共中央、中央军委的正确领导,毛泽东军事思想的指引,东北军民的共同奋斗等条件之外,建设二线兵团,充实扩大主力亦是四野发展壮大的重要措施. During the War of Liberation, the Fourth Field Army was one of the five main forces in our army, with millions of troops and strong troops and strong forces. It was recognized as an indelible contribution to the defeat of the Kuomintang army and its rapid growth and fighting power. In addition to the correct leadership of the Central Committee of the CPC and the Central Military Commission, the guidelines of Mao Zedong’s military thinking, and the common struggle of the military and civilian people in the Northeast, it is also an important measure to build a second-tier corps and expand and expand the main forces.