自北宋中叶宋夏正式交战，北宋西北边境诸州军的战略地位陡然上升，其中尤以位于鄜延路北端的延州为重。作为宋夏交通线上的枢纽，延州以其特殊的地理位置，承担着重要职责：在战争时期，北宋政府于此积极修筑堡寨、发展屯田，使之成为军事要塞和后勤补给地；在和平时期，该地不仅是宋夏交聘往来的指定地点，亦是宋夏争夺周边少数民族支持的重要地区。%Since the Northern Song and Xia dynasties were at war, the northwestern border prefectures turned strategically significant,especially Yanzhou at the northern point of Fuyanlu. As a Song-Xia traffic pivot,Yanzhou occupying a special geographical position shouldered key responsibilitiesduring wartime,the Northern Song government actively built garrisons and reclaimed arable lands to make this region a military stronghold as well as logistic center;during peacetime,this region turned not only a land for Song-Xia communication and transaction,but also the arena for both sides to gain support from ethnic groups.
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