1946年6月26日,以国民党军大举进攻中原解放区(司令员李先念)为标志,国共内战全面爆发,很快发展为人民解放战争,并在作战区域上形成了南北两线战场:南线,指华东(有时称山东区)、晋冀鲁豫(有时称太行区)、西北(包括晋南、榆林、宁夏,不包括兰州以西)诸战场;北线,指东北、晋察冀、晋绥诸战场。 On June 26, 1946, marked by the Kuomintang army’s massive attack on the liberated areas of the Central Plains (commander Li Xiannian), the civil war broke out in full swing and quickly developed into a people’s liberation war and formed a battlefield of north and south two lines in the combat zone: the south line, Refers to East China (sometimes called Shandong), Shanxi-Hebei-Shandong-Henan (sometimes called Taihang), Northwest (including Jinnan, Yulin, Ningxia, not including west of Lanzhou); northern line refers to Northeast, Shanxi-Chahar- Various battlefields.