Gallic Confederation Archive (AltHistory Deleted Timeline)
Recognizing that the Romans had an upper hand on the battlefield due to their panoply and training, Vercingetorix declined to give battle against Romans and instead fought a "scorched earth" campaign to deprive them of supplies.
Caesar hurriedly returned from Italy to take charge of the campaign, pursuing the Gauls and capturing the town of Avaricum (modern city of Bourges) but suffering a defeat at Gergovia. Vercingetorix, instead of staying mobile and in the open, chose to hold out at Alesia (see Battle of Alesia).
Caesar besieged him, but was beaten when a Gallic relief army broke the defenses and butchered the legions. In 51 BC, Gallic war parties razed all remaining roman settlements and raided Aquitania, Narbonensis and Gallia Cisalpina. Gallic warriors seized control of all passes through the Alps and a peace treaty was signed, effectively ending the Gallic Wars.
Leaders of Gallic tribes met in June 50 BC at the Conference of Gergovia, where they laid the foundations of the newly-found Gallic Confederation. The Conference defined borders of Magna Gallia (consisting of Aquitania, Belgica, Celtica and Narbonensis) and gave limited power and autonomy to local chiefs.
Vercingetorix was crowned as High King of Gaul and Rixhalla (an administrative and legislative body) was established. Immediately after the Conference of Gergovia, Rixhalla started reforming the military and economy. A road network was built, connecting all major settlements and boosting trade. Mandatory military service (for a period of 2 years) was introduced and military equipment and tactics were standardized.
Rixhalla sent envoys to Britannia and achieved trade agreements and non-aggresion pacts with many Britannic tribes. They did the same with Germanic tribes, but the envoys were mostly unsuccesful because of cultural differences. Trading settlements were built on the Atlantic coast.