920 A.D.

Keystone T-2

-Zenan mainlanders first began colonizing the El Nido Archipelago.***
-Viper Manor is built by the Viper Clan.
-Dragonians begin to reach extinction, while some El Nido natives and 
demihumans are driven to the outlying islands.

***Ultimania gets this date completely wrong. To compound the problem, Steena
states that El Nido was settled from the outside "hundreds of years ago." She
later states correctly that it was settled one hundred years ago. This is
apparently just a script error.

From: Chronology