on the advance 意味

• 値上がりして、騰貴して
  

例文

1. going down the tokaido road , koremori ' s army had difficulty not only recruiting soldiers due to the information that the minamoto clan around the country were raising armies one after another and on the advance , disseminated while his army was procrastinating but also procuring food due to the poor crop during the summer .
   東海道を下る追討軍は、出発が伸びている間に各地の源氏が次々と兵を挙げ、進軍している情報が広まっていたために兵員が思うように集まらず、夏の凶作で糧食の調達もままならなかった。