It would be nearly ten years before the UFC would expand their divisional offerings to include any of the lower weight classes. The first additions came in late 2010 when the UFC merged with their sister organization World Extreme Cagefighting (WEC). Due to the WEC's focus on lighter weight fighters, this merger necessitated the addition of both the featherweight and bantamweight divisions to the UFC, starting with . In early 2012 the UFC decided they would delve even further into the lower weight classes when they announced the introduction of the flyweight division to their ranks, beginning with .