The United Communist Nations, also known as the UCN, are an alliance of multiple communist states throughout the multiverse. Their main purpose is to help each other fight hostile imperialistic/democratic alliances and nations. It was formed by the Jupiter Federation after they discovered the power of red matter on their side. Though, it does not include all the Communist powers, as many side with either the Alliance or the Axis, it became a neutral faction within the Multiverse all throughout the First Multiverse War.
- Jupiter Federation
- Coalition of Bolak
- Soviet Order of Saturn (before the revolution; which resulted in it leaving the UCN)
- East Germany (Part of the Warsaw Pact)
- Czechoslovakia (Dol Universe, Part of the Warsaw Pact)