The Jerris Air Races takes place during the Bloodpeace Festival, yearly custom that has become an annual tradition. It commemorates when the Theran city of Skypoint and Vivane and the Barsaive city of Jerris formed a reluctant bloodpeace as a show of good faith to promote commerce in the region. Under the Bloodpeace, neither side can send airships to attack across the mountain range between the two. This pact is magically enforced by a stormy barrier that appears to buffet the offending ships, often leaving them crippled and in no condition to fight.