Operation Chieftain was the codename given to what would become known as the Hegemony Campaign. The retaking of the Terran Hegemony worlds during the Amaris Civil War. Begun on July 14th, 2772. As the final battle of the Hegemony Campaign and, indeed, the civil war, the effort to win back the seat of the Star League would prove to be a grueling affair, resulting in immense destruction and the loss of millions of lives.
- Historical: Liberation of Terra Volume 1, p. 118, "Returning Home"