The Benecia sector was a region of space, a sector located in the space of the United Federation of Planets, on the border of the Federation-Klingon Neutral Zone.
History and specifics[]
In 2278, several Klingon heavy cruisers, along with at least two dozen birds-of-prey, gathered at the Benecia border of the Neutral Zone. This was leaked to Starfleet, which responded by sending all their vessels in the sector in anticipation of a border dispute. In fact, this was a ruse so that Kozara of the IKS SoSoy Toj could invade the Fries-Posnikoff sector and destroy Starbase 12 without resistance. (TNG novel: Ship of the Line)