Ren Xiaosu was unaware of what was going on at the southern front line. He only knew this stronghold was finished when he saw the fiery flames in Stronghold 88.
Currently, the permanent garrison troops of Stronghold 88 were only left with the military strength of an independent infantry regiment. If this were a normal defense, even an infantry brigade would not be able to defeat it, unless it was an armored brigade or rocket troops.
But the whereabouts of all the Qing Consortium's fighting forces were known to the Yang Consortium's intelligence agency. It was impossible that they could have allowed the Qing Consortium's heavy firepower troops to get so close to Stronghold 88.