This is part of the DragonSoul continuity.
The Homeworldian War of Earth was the returning conflict between The Intergalactic Police Force and Homeworld over the fate of Soiterra and the other planets in The 7th Quadrant. It was the 3rd interstellar war overall pertaining to the planet Soiterra.
It started in the year 18365 A.M.D and ended in 23002 A.M.D with a mutual treaty.
Soiterra was completely off-limits to any outsiders during this time, thanks to a quarantine put forth by The Intergalactic Police Force. This was due to the planet's status as the recognised Center of The Universe.