An alliance is a group of nations that help each other in many things, including politics and military, and is focused on mutual prosperity. A nation can only have one alliance. When a country enters an alliance, an MPP is made between it and all of the other members. There are different alliances in Ukiworld, each fulfilling a different purpose. That doesn't mean that if an alliance is based in a specific continent, it doesn't prevent nations from other continents joining in. Therefore, for example, several alliances with nations both in Oligrendia and Bezeriath exist.