Kingdom of Dimmin is a stellar kingdom that includes over 600 solar systems. Before Space War, it has only 299 solar system, buit it has annexed lots of solar systems of Okarian Empire and Federation of Lactia. before war, it was ally of Federation of Lactia.
The kingdom could have been easily defeated by the Okarian Empire, as they had no army before the war. However, when plutonian troops won the triple battle of Istara Group/Camusa Alpha, they won enough time to prepare a defensive army. However, after wins at Chantis and Alef Gramma Kagun, the army became an offensive body, invading its own ally and destroying the Okarian Empire.