In the east , meanwhile , Song generals like Meng Gong and Du Guo withstood the pressure of the Mongol armies under Kouwen Buhua .
The main Mongol forces were at that time moving towards Europe .
In the east , meanwhile , Song generals like Meng Gong and Du Guo withstood the pressure of the Mongol armies under Kouwen Buhua because the main Mongol forces were at that time moving towards Europe .