The population of fire-breathing dragons exceeded the norm and therefore they stopped being afraid of people. Moreover, the dragon began to inhabit those territories that they had not been able to live in before. In the game Onslaught Defense they try to break the wooden gate and invade the Viking state. Do not wait for the huge predators to smash everything in the dust and they need to urgently resist. Immediately convene an army of defense and try to confront the adversaries. In addition to dragons, there is a battle with their allies, whose leaders are the Big Black Serpent and the Bat. Place the army so well that you can easily repel the attack.