The Earth Faction

Earth. the green and blue planet we know of with many advanced Tech at the year 2202. The earth have survived many Events

It has 2 (or more) military branch of space forces.
1. United Nations Space Command (Halo)
2. United Nations Cosmo Fleet (SBY)

The first is the widely known, United Nations Space Command, a western controlled Branch, where it handles both Planetary and Space Combat with Great and strong Equipments. They have survived the covenant invasion on earth (which they are still active in) and the Garmillas-earth war. (They are from HALO)

The second branch was the United Nations Cosmo Navy, a Japanese Controlled Branch. That mainly fought during the Garmillas war. During this, they sent out the yamato to go to iscandar and get the cosmo reverse system. After the war. The garmillas made peace and earth was back to its normal conditions

The history of these two branches were an amazing duo as forces of Earth. Despite the two different techs. The two parties helped each other preventing total destruction from both the Covenant and garmillas. Despite it however. On 2191. The UNSC was busy fending off the covenants that the unsc was unable to defend earth at the time garmillas invade and left the UNFC to fend for itself. This led to 9 years of busy fighting until the yamato was sent and made peace with garmillas. After finally receiving word from earth again.

After an established alliance with garmillas. On 2202 the two Parties were now rivaling each other but are the great defenders of earth against extraterrestrial enemies.

However. With the universe introducing more and more Nations with unknown intent. Would they survive against the biggest threat of the entire Universe

(Note: if i forgot to add a faction like the ones from star trek or mass effect or maybe some helldivers. Its up to someone else to introduce them because im not that well knowledgeable to this factions. Halo is one of them i just have to include them. And they are able to be controlled by anyone)

(This are Non OC Factions and are an existing fictional Faction)
@stickyellow is it fine to add them?