At the start of the 4th age the Cadarn family spearheaded an expansion into the lands east of Arandar. The occupation lasted for several centuries, before its final collapse near the end of the 4th age. With the death of Baxtorian Cadarn and his sons not yet of age to rule, the elven clan returned to Tirannwn leaderless. The Cadarn clan lost much standing within the elven council in this time. This led to a cessation of all exploits within the east land and the eventual closure of all routes through Arandar.