After becoming the general, the first thing that Leonhart did was to ask his advisor about the situation of the army and the war. And from what he heard, he became sure that clearing this stage would be very hard.
His beastkin army had a total of twenty five thousand soldiers divided into 5 legions with five thousand soldiers in each one. Each of the legions was led by an A rank commander and they had 5 B rankers under them to lead 1000 soldiers each with the title of Brigadier General.
On the other hand, the army of the demons had a total of sixty five thousand soldiers who were divided into two camps. Each camp had a S ranker as the leader and five A rankers as the general. Even one single camp was stronger than the beastkin army so fighting against two camps at once, they were in a very bad situation.