Space Defense System

The Space Defense System (or SDS) was a series of defensive systems that were deployed on Terran Hegemony worlds during the time of the Star League. Based on multiple layers of defense, the Space Defense System relied on drone and robotic WarShips to interdict an invading flotilla in space. These systems were augmented by large capital grade energy weapons and LRM launchers located on a planet or moon.

SDS Components

Control Systems

The first SDS was built by the SLDF under the leadership of Jonathan Cameron in 2690. The command systems installed in the planetary bases and space elements were so advanced that a handful of people could control the SDS of an entire star system. The computers, designed by Ulsop Robotics and the Nirasaki Computers Collective, could route around damaged systems, and even launch more fighters and defenders on their own from specially built computer-run spaceports. These computers were not without their flaws however. Shortly after the first Caspar drone WarShips were deployed they accidentally destroyed three civilian vessels. These problems were later solved.

The programmers worked with the Terran Hegemony's best admirals to enter a comprehensive set of naval tactics. The programmers did their jobs well, as the SLDF would later discover. The computer's desire to control the pace of an engagement and take the offensive was often a source of consternation to the officers that opposed them. They also set their own target priorities and worked together to destroy enemy forces.

The computers couldn't adapt to certain combat conditions, however. During Kerensky's assault on Terra, the captains of crippled SLDF WarShips piloted their ships on suicide runs to destroy battlestations and SDS WarShips. These tactics confused the computers, allowing SLDF forces to land.

Space Elements

The primary defensive element of the SDS was a series of automated space stations located at a solar system's primary jump points. These stations mounted capital weapons and could easily destroy any attacker that came into range. Not content with that purely defensive stance however, the SLDF Navy created the Caspar drone WarShip.

Technically named the M-5 Drone, the Caspar series of drone WarShips used the frame of the Lola III-class destroyer as their chassis. With no need to stock food, supplies, or provide crew quarters, the ships were upgraded to include a weapons suite more common to a battlecruiser. As the ships were not limited by human limitations, they could outmaneuver the manned vessels they were designed to attack. Using the advanced computers provided by Nirasaki Computers Collective and control systems from Ulsop Robotics, the Caspars could out-fight any manned ship in space.

To defend the Caspar from enemy AeroSpace Fighters, they often carried robotic interceptors like the BlackWasp. Basically an AeroSpace Fighter-sized drone, the BlackWasp was also used by worlds in the Star League that didn't rate a full-fledged SDS. When a part of the SDS however the BlackWasps were far more effective in their duties.

Planetary Elements

Realizing that the space elements wouldn't be able to destroy every incoming enemy, the SDS designers used ground-based systems to augment their firepower. By mounting Naval Lasers and Naval Particle Projection Cannons in fortified emplacements the engineers insured that any attacking DropShip or WarShip that reached the atmosphere of the planet would be engaged by heavy firepower. To engage smaller, faster targets like AeroSpace Fighters the designers installed modified LRM batteries that would saturate the target area with munitions. These missile systems could also be used to attack incoming 'Mechs and supplement the firepower of the main anti-WarShip weapon. Each SDS ground base mounted at least one Capital Weapon and between three and ten missile batteries.

SLDF records indicate that Terra had at least 30 of these bases located in Europe and Asia. SLDF records indicate that Terra had at least 30 of these bases located in Europe and Asia. Recent intelligence suggests that there were at least 500 SDS facilities on Terra. How many of these were armed stations, rather than sensor or command stations, is unknown. There was at least one armed SDS station in the Andes Mountains however.

Performance

The Space Defense Systems were a triumph of engineering and programming. When the Thirty-fourth Royal BattleMech Division attempted to re-take Epsilon Indi from the Rim Worlds Republic forces garrisoning it, the 56 Caspar drones of the SDS destroyed the entire unit. This included a Black Lion-class, two Aegis-class, four Lola-class, and one Potemkin-class WarShip. Until the SLDF forces gathered information from the ruins of the Nirasaki Computers Collective factories, every system defended by an SDS cost the SLDF Navy at least three WarShips.

The only weakness in the system was the large number of communications links between the drones and the controlling computers. In 2775 the SLDF created a new ECM system that jammed the primary communications links with static, forcing the SDS system to use backup links. Though the Caspar drones nearest the SLDF fleet were still able to attack, ships farther away from the fleet and the planetary defenses couldn't get the communications they needed to target the fleet effectively. This allowed the SLDF fleet to defeat the SDS' component elements without facing the ferocity of the entire system.

Legacy

Though the advanced control systems of the SDS were never duplicated by the Successor States, elements of the SDS concept were used as the basis for several weapons systems. The Draconis Combine Admiralty's BattleSat and Federated-Boeing's Capitol space station are two examples of the orbital battle platforms pioneered in the SDS system.

The Word of Blake also established some form of the SDS defense system in the Terra system at the start of the Jihad, as evidenced by the failures of Taskforce Vengeance and Case White. A similar system was encountered by Devlin Stone's Coalition forces when they attacked Rochelle.

Bibliography

• The Star League
• Jihad Conspiracies: Interstellar Players 2
• BattleSpace (Rulebook)