1928年四五月间，朱德、陈毅同志率领南昌起义军余部来到井冈山，与毛泽东同志率领的秋收起义部队胜利会师，随后成立工农革命军第四军（6月改称红军），毛泽东任党代表、朱德任军长。在“红四军”建立了我军历史上的第一个正式的迫击炮连。这年8月下旬，湘赣两省军阀乘红军主 In April and May 1928, Comrade Zhu De and Chen Yi led the Nanchang rebel army to the Jinggangshan. Comrades of the Autumn Harvest Uprising led by Comrade Mao Zedong won the victory. Later, the Fourth Army of the Workers’ and Peasants Revolutionary Army (renamed the Red Army in June) , Zhu Deren commander. In the “Red Army” established the first official mortar company in the history of our army. In late August of this year, the warlords in Hunan and Jiangxi Province took over the Red Army