Urdesh

Urdesh is the Sabbat forge that joined Horus to keep its Titan legion, ran Dark Mechanicum saboteurs toward Terra, and was purged by Malcador's Legio Ignatum in the Cataclysm of Iron. Reintegrated, it armed the sector until Chaos took it mid-crusade and started stamping Urdeshi tanks for the Archenemy. Macaroth's later fight for the world is why people talk as if the crusade ended here.