Often used in science fiction works, an interstellar alliance is an alliance between two or more distinct solar systems. Often in these pieces, there are two or more opposing alliances of varying strengths, or a rebel network opposing a single alliance. If faster-than-light travel is ever developed, these types of organizations could theoretically develop Template:Fact in a similar fashion to countries and alliances on Earth.
- Galactic empire
- Star Trek's United Federation of Planets
- Babylon 5's Interstellar Alliance
- Star Wars's Galactic Republic
- Star Trek Encyclopedia - ISBN 0-671-53609-5 on page 675 - Referencing the United Federation of planets as an "interstellar alliance"Template:Sf-stub