The Sol-Gillaxian War

Overview
The Sol-Gillaxian War was a great conflict between the United Systems of Sol and the Galactic Gillaxian Empire for the contested system of Betelgeuse, which ended in the victory of the Galactic Gillaxian Empire, and caused the great rebellions of Sol.

History
During their efforts to expand their borders beyond the nearby clusters, the U.S.S had sent and deployed their forces to the great star system of Betelgeuse, however, unbeknownst to the U.S.S, the Gillaxian Empire had already deployed forces on the system on attempts to use the massive energy of the great star.

While at first the U.S.S attempted to remain neutral to the Empire, in a foolish attempt to raise the public opinion of the Stratocracy, they declared war against the Gillixian Empire. The planets around the massive star were quickly invaded, any Gillaxian resistance was squashed without any problem, and the initial fleet attacks were repelled, giving a fake-sense of security to the Citizen Stratocracy.

In reality, the U.S.S had fought a small force of the Gillaxian Empire, soon after Emperor Gladius Gillax led a massive force, each invaded planet was liberated from Terran forces. the planet called Betelgeuse Prime was the last line of defense and where the first U.S.S Shock Troops Corps. were deployed, the war for the system lasted almost a year, until the cold realization reached Sol, that the Galactic Gillaxian Empire was way stronger than they originally thought.

Surrender
After realizing their inevitable defeat, the U.S.S sent their terms of surrender to Emperor Gladius Gillax, which he accepted, having no interest in the Sol System and their conquered systems, they let them go almost unscathed.

Aftermath
In their attempts to heal the image of the Citizen Stratocracy, the U.S.S ended up further harming it, the colonies saw the once gargantuan Stratocracy as a weak now, thus beginning the first stages of the Sol Rebellions.