Another alternate NA. POD: Charles the Bold is not only bold in this timeline, but also smarter, avoiding too many enemies at the same time. After forging an alliance with the HRE and England, Burgundy attacks France. In 1485, when Burgundian troops besiege Paris, King Charles VIII sends an assassin to kill Duke Charles. But the assassination fails and the Duke swears to kill the whole French Royal family in the event of a victory. When Paris fells, Charles VIII and some hundred loyals followers flee to the coast, embark on a dozen ships and flee westwards, harrassed by English and Burgundian ships. In a storm the French manage to get rid of their pursuers and some weeks later they land on a new coast in the west - surely the legendary Atlantis - and meet the Mexica. Without any support from home, the French under their King-in-Exil Charels VIII submit to the power of the Mexica king and give their new overlords the knowledge of metalcasting and many more. Back in Europe the Kingdom of France breaks up into a dozen successor states. When a Bretonian ship lands on the coast of Atlantis in 1498, they find a powerful Mexica Empire (called Aztekans, or Imperium Aztekanum) with a strange mixed culture of native and european content.
The map shows the political situation in 1780.