Deep, excavated in the rock, was flanked by counterscarp galleries.
Deep, was defended by counterscarp galleries.
They had incurred an additional loss of 13,000 men without substantial gain, except a lodgment on the counterscarp of Sung-Shu.
On the 17th of November seven mines were exploded at Sung-Shu, which blew in the back of the counterscarp galleries.
At Chi-Kuan, the counterscarp gallery had been breached by an ill-managed Russian mine on the 23rd of October and the Japanese got in through the breach and made a lodgment.
They did not, however, get possession of the whole of the counterscarp galleries before about the middle of November.