Choke Point

In military strategy, a choke point (or chokepoint) is a geographical feature on land such as a valley, defile or a bridge, or at sea such as a strait which an armed force is forced to pass, sometimes on a substantially narrower front, and therefore greatly decreasing its combat power, in order to reach its objective. A choke point would allow a numerically inferior defending force to successfully prevent a larger opponent because the attacker would not be able to bring their superior numbers to bear.