In Norse mythology, the Æsir–Vanir War was a war that occurred between the Æsir and the Vanir, two groups of gods. The war ultimately resulted in the unification of the two tribes into a single tribe of gods. The war is an important event in Norse mythology. The two side eventually came to a truce by spitting into a bowl; the spit was mixed, and the god Kvasir was born. Kvasir was killed by dwarves for his blood.