U.S.R., Federal Entity of Level 2 on Earth
The exact name is "Universal Sovereign Republic # 1", since
it was the first. You can see on the organization chart below. For example, Mars would be # 2, etc ... At the
level of the Solar System, we think of a Universal Sovereign Republic S # 1, since it is the first. That would
give URSs # 1, for the Milky Way, it would be URSss # 1, etc ...