一、沦陷区和阎管区的恶劣环境十二月事变之后,在山西大体形成了五种地区:一是共产党领导的抗日根据地,主要是晋东北、晋东南、晋西北抗日根据地;二是日军占领的沦陷区,主要是同蒲铁路、正太铁路、白晋铁路及主要公路等交通要道和这些交通要道上的若干大中城市;三是根据地和沦陷区之间敌我双方势力都可以深入的游击区,主要是同蒲铁 I. Harsh Environments in the Enemy-occupied and Yan-controlled Areas After the December Incident, there were generally five regions in Shanxi: one was the Anti-Japanese Base under the leadership of the Communist Party, mainly the anti-Japanese bases in northeast, southeast, and northwest Shanxi; Of the occupied areas, mainly the Tongpu Railway, the Zhengtai Railway, the White Horse Railway and major highways and other major traffic arteries and a number of medium-sized cities on these traffic arteries; third, the enemy and the enemy forces between the enemy base area and the enemy forces can be in-depth guerrillas District, mainly Tongpu iron