In the fifth year of Tonghe,Shengzong would recover the three passes to ensure the security of the southern territory as the target of the Khitan military strategy to the south.However,due to the mili-tary crisis and the east-west border,this goal was temporarily stopped after the recovery of Yanyun lost territory in seven years.In the seventeen year of Tonghe,after solving the crisis accordingly,Shengzong went south again,and his combat objectives were still pointed to the three passes.However,with the strengthening of the Song army in the three passes,the two armies of the Song Dynasty formed a stale-mate in Hebei.In the battle of Chanyuan,the death of Xiao Dabin caused the two armies to fall into a new stalemate,and peace discussion became the only choice of the two armies,and the Khitan terminated the century of southward military strategy.
维普
万方数据
