An even more important point is that, the Shalba family dispatched a total of three thousand people to hunt in the Donau Wasteland, and the ace infantry of the Tornado Mercenary Group —— the two squads of heavy scythe-wielders were also hired by the Shalba family. The fact that such a powerful military force could be swallowed up necessitates Gatuso to take the strength of Bimon Territory seriously.
According to Marquis Capello, his heavy scythe-wielders were knocked down into the glacier by the Bimon River's hippo warriors. Hence, Gatuso decided to wait until the cold tide arrived in half a month before taking action. Once the ice age arrives, the ice layer of Sanggan River would be two fingers deep, and by then, these hippo warriors of the Bimon Territory will no longer be an asset.
This is just Gatuso being cautious, the Tornado Mercenary Group's foundation is also very deep.