The Vexanova Four Nations, also known as the VRB Vexanova Four Nations or simply Four Nations, and often abbreviated to B4 or B4N, is a multi-national rugby competition founded in 299 AP. The competition is contested between the national rugby sides of Caledon, Deucoland, the United Territories, and Westria. The competition is considered to be one of the two best rugby competitions on Vexillium, along with the Northern Hemisphere's Four Unions Championship.