Deo managed to get a hold of the General. The Thunder Claw's orders were simple. Keep the princess safe, and kill as many goblins as possible. So, Deo devised a plan. albeit a simple plan. All Aerial Calvery plans really boiled down to one thing. Hit them hard and hit them fast. "I want five men at the castle main gate," Deo said, determination in his voice. "Another five will move through the city, funnelling them to the gate. I want three dragons on each side, ready for a pincer manoeuvre, with two ready to charge forward into the mess. The last soldier, with me. Figure the roles out amongst yourselves. Andrion, stay as overwatch. Run this operation for me until I get back." 
It was a standard kill box strategy. The type of thing they teach you in the first year of battle school. It really boils down to teamwork. 

Deo Bearrider banked his dragon out of formation. Another knight followed him. HE flew over the castle wall. He pulled a barrel roll just as he passed the wall, to a cheer from the guards stationed on it. The return of the Thunder Claws heralded a turning of the tides of war. 

Stones cracked, as the weight of the mechanical dragon set down. Deo dismounted and ordered his mount to remain on guard. The other soldier also dismounted, but instead of following Deo, who entered the palace, remained outside. 
Deo was shocked by what he saw within the Palace. Dead goblins a handful of soldiers, and cowering Nobles. None of this was good. "Princess," Deo said as he spied the Princess, and approached her. "Is this all that's left?" He questioned. "The General is leading a small resistance near the city limits, but he doesn't think he will last long. If he falls, we will surely follow."