- You may be looking for the Five Years of Peace from the Mobius: X Years Later universe.
The Great Peace was a time period on Anti Mobius that began roughly ten years ago and was an era of peace and prosperity across the planet. Among those who embraced the Great Peace were Anti Jules Hedgehog, who became so wrapped up in it that he barely had time for his son, Anti Sonic.
However, years of peace brought about stagnation, and eventually those in charge were ousted from power by Anti Sonic and his band of Freedom Fighters. (StH: #192, SSS: #10)
- The Great Peace could effectively be the Anti Mobius's equivalent to Mobius Prime's infamous Great War.