Frig

Frig was the prison colony of the the old Stroga Empire. The Strogan Emperor would banish those who had committed shameful crimes, or political treason, to the frozen planet of Frig, to a die a painful and icy death. For thousands of years, Frig was used this way, never retaining a population, as no person lasted on the face of the planet longer than a few years.

Then a clever and radical scientist was placed on Frig by the Emperor. The scientist however was able to cobble together a simple messenger probe and sent it to the nearby rich planet of Bennu to ask for help and refuge. The people of Bennu refused to let a criminal onto the planet, but were moved enough by his story to send food, and water purifiers, and heaters, and shelters, and extractors, and blankets. And of course, Stroga Empire (never thinking anyone could survive on the frigid planet) never monitored it, and so were oblivious to the population now growing and thriving on Frig.

When the old Stroga Empire collapsed into the warring states period, Frig declared its independence and showered Bennu with sculptures and paintings, tokens of its appreciation for saving that scientist long ago. Frig also followed Bennu's lead in quickly coordinating a full rebellion against the Overlords in 21319. Now, Frig is one of the most populous planets in the galaxy and well known for their marvelous culture- itself a marriage of art, and charity, and science.