"Once, mankind accepted a simple truth; that they were not alone in this universe. Some worlds man believed home to their gods. Others, they knew to fear. From around the cold and darkness came the Frost Giants, threatening to plunge the mortal world into a new ice age. But humanity would not face this threat alone."
Odin to Loki and Thor[src]

The Battle of Tønsberg was a battle between the Asgardians and the Frost Giants that was fought in what is now Tønsberg, Norway.


Taking place in 965 A.D., Laufey, the king of the Frost Giants, violated a peace agreement with Odin and attempted to conquer the Nine Realms, beginning the Asgard-Jotunheim War.[1]


The war eventually reached Earth, where the Frost Giants invaded the small Viking village in what is now Tønsberg, Norway. Using the Casket of Ancient Winters, King Laufey murdered hundreds of human villagers, until the Asgardians assembled an army of their best warriors and drove the Frost Giants from Earth.[1]


The war raged for months until the Frost Giants were driven back to Jotunheim. The Asgardians invaded Jotunheim and Laufey surrendered.[1]