 However, Thorin is unwilling to share any of Smaug's treasure with an armed host at his gates, which causes the elves and men to prepare to attack the mountain.To make matters worse, Thorin's cousin Dáin II Ironfoot arrives to reinforce Thorin's claim to their family home under the mountain.However, a large army of Goblins and Wargs arrives on the scene, forcing the three armies to unite to fight against them.