Easir is a system within Alliance space and at one point was the site of a major battle.
At some point prior to the Alliance attack on the Syndicate home system, the Syndicate Worlds attempted to take the system. An Alliance fleet successfully repelled the Syndicate, but at great cost. All of the Alliance battle cruisers and half of the battleships present were lost, and the lighter escort vessels were decimated. Syndicate losses were nearly identical, with Captain Tanya Desjani bitterly complaining later that the two sides traded losses almost ship for ship.