SUAF, was founded in 2053 CE and rebranded from United Nations. Their HQ is located in New York City on Earth and they are the main gouvernment on Earth and rest of the Sol System. Earth, Moon and Mars founded the alliance. Enceladus and Triton joined in after colonization in late 21st century. There are other states such as Veros Eridani II, the human-colonized planet outside Sol System, but they only have an ambassador to have cooperation with the federation. The Peurobians are also in cooperation with SUAF and have an ambassador as they have formed an alliance with SUAF.
Sol United Alliance Federation is divided into several autonomous federation states. Earth and the Moon are one federation and Mars is autonomously controlled by the Martian Autonomous Republican Federation, but still part of SUAF.