The redesign of the Marine Corps is driven by China's pivot towards the sea, and that primary front which they have opened up has renewed great power competition—and you can add Russia, of course, to that equation, Gen. Berger said. Advances by China's missile forces means that 'presumptive sea control is no longer something that the United States can rely on. We will compete for it. Enter what the Marine Corps calls expeditionary advanced base operations, a concept being pursued to distribute highly mobile Marines across Pacific islands and arm them with advanced missiles that can aid the Navy by sinking rival ships in contested choke points.
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.
A choke point can allow a numerically inferior defending force to thwart a larger opponent if the attacker cannot bring superior numbers to bear.