Thrakhra captured by the TCS Tiger's Claw, circa 2654.

The Thrakhra concom entered service in 2652, the last new Kilrathi warship until the introduction of the Fralthi light carrier in mid-2654. It represented a shift in strategic thinking for the empire, focusing command and communications capabilities in a smaller, quicker ship rather than a heavy battleship. Owing to this strategy, very few Thrakhra were identified in action; as of 2654, only eight had been identified by the Confederation.

Thrakhra carry a large contingent of fleet support specialists, strategists, intelligence analysts and communications and sensor techs--a far cry from the fight-minded warriors found on the bridge of a typical dreadnaught. Thrakhra do also serve a direct military role in addition to their planning capacities; twelve torpedo tubes mount ship-to-planet missiles which are used for bombarding worlds after their spatial defenses are eliminated.

The Kilrathi push against Earth in 2654 fell apart after their Thrakhra concom and its particular cargo was captured by marines off the TCS Tiger's Claw. Another concom, Dark Eye, was destroyed weeks later by the rebel TCS Olympus while it was coordinating a scanning operation near the border.