 Complete the following phrase:  He offers the Grand Duke of Ryazan, Yuri Ingvarevich, a chance to surrender, but Ingvarevich refuses. Along with his generals Burundai, Jebei, and Subutai, Batu successfully leads his army against the city. However, Ingvarevich and some of his soldiers escape, relocating to the forests along the Sit River. Led by Burundai, a force is sent through the forests to take Ingvarevich by surprise. At the 