Board Thread:Warhammer 40k General Discussion/@comment-24.177.35.35-20130913034201/@comment-3580035-20130917234613

The wrecked ship was 4th edition codex information, but it may have been retconned away.

In 6th ed, the Tau were amazed to see Warp Drives left over from the Damocles Gulf Crusade. Considering this happened during their Second Sphere of Expansion, they may have cracked the tech by now.