“东出雁门关,心境完全不同了!天空是弥漫的战云,眼前是古代的战场。”当年,范长江这样描述南口战场。南口,因其位于居庸关以南而得名,高山峻岭,关隘重叠,自古即为北平通往西北地区门户之一;华北至蒙疆大动脉平绥铁路通车后,又成为该线东段重镇,素有“绥察之前门,平津之后户,华北之咽喉,冀西之心腹”之称,并由此成为日军进犯 “East Yanmenguan, mood completely different! The sky is filled with war clouds, the immediate front of the ancient battlefield. ” At that time, Fan Changjiang described the southern mouth of the battlefield. South of the mouth, because of its location in the south of Juyongguan named, mountains, pass overlap, since ancient times is one of the gateway to Northwest Peiping one; North China to the Xinjiang Autonomous Region Pingtung Railway opened to traffic, has become the eastern section of the city, Known as “Sui Cha front door, Pingjin after the household, the throat of North China, western Hebei heart ”, and thus became the Japanese invasion