The Assault of the Tempest Galleries is the rare battle of the ancient Unification Wars that united Ancient Terra under the control of the Emperor of Mankind in the late 30th Millennium that is still recorded in Imperial archives. The Caucasus Wastes was a techno-barbarian state located in the Caucasus Peninsula of the ancient European continent on Old Earth. Its despotic ruler, known as the Ethnarch of the Caucasus Wastes, was defeated by the forces of the Emperor and imprisoned in the maximum security Imperial prison in the Himalazian (Himalayan) Mountains known as Khangba Marwu, The Vault. The primary Imperial force responsible for this outcome was the early XVIII Legion of Space Marines, later known to history as the Salamanders.