关塞如铁,固若金汤。日本鬼子恁是没有办法 。后来的抗战实际,证明这个选择是正确的。日寇数次叩关,无一不是损兵折将,铩羽而归。关塞于国防之重大作用,再次显现。
关是一个点,塞是一条线;关管一个城,塞管一片地。关多人为,塞多天成;关有人据守;塞有险自立。关是塞上的枢纽,塞是关的延伸。关多有城有门,塞可以是山河,甚至沙漠戈壁。
我国历史上习惯把横亘北方的长城叫“塞”,例如“昭君出塞”、“塞上长城”等等。其实,长城是北方起天然隔离带作用的一系列大山的隔离作用的强化,长城就在山顶、戈壁、沙漠、草原上修着。这是明证。
中国北方是游牧民族,常常南下牧马,与汉族争夺生存空间。所以,中国历史上的危险,多来自北方,于是关塞主要对北方而言。
关是关,塞是塞,关塞血肉相连,这就是结论。
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