Roleath (also known as DX Cancri II) was a Human colony near Harvest. Established independently of the UEG and UNSC, the colony was annexed by these organizations in 2412, under the promise that its government could remain partially autonomous. It was attacked by the Covenant in 2529, and was partially glassed before they were driven from it by UNSC forces under the command of Admiral Allen Hestly. The Covenant later returned to the planet in 2546 and glassed it, but by this time most of the population had already fled to the Inner Colonies.
Covenant Cover Up
When news spread of the Covenant attacks on Harvest, the Roleathan government worried that people would begin to panic due to the colony's close proximity to Harvest. To prevent this, Prime Minister Jonathan Matthew enacted a massive cover-up to hide the Covenant and its actions from the Roleathan people. However, when the Covenant attacked the colony in 2529, this cover-up prevented the UNSC from carrying out WINTER CONTINGENCY as intended.
Many Insurrectionistsdid recieve word of the future attacks, but most fell victim to various conspiracy theories.