Sector 49 was an Earth Alliance sector guarded by an Earthforce base which served as the last stopover point for ships travelling between Earth and Babylon 5. In 2261, President Clark ordered the Earthforce base in Sector 49 to keep a squadron of Starfuries on patrol beside the local jumpgate with orders to challenge any ship coming through the gate as part of an ongoing embargo of Babylon 5. At the same time the Psi Corps's Black Omega Squadron and several heavily armed transports were despatched to stage an attack on the patrol and frame Babylon 5. The plan is foiled when Alpha Squadron lead by Commander Susan Ivanova intercepted Black Omega before they could destroy the Earthforce patrol.