In Tau Past - 1920, Admiral Kosciusko travels into the past and arrives at an alternate Earth being invaded by aliens. After dealing with them he decides to make use of their space folding technology and begins to rebuild the Tau Fleet. An atrocity keeps his attention on Earth for a while, but the stars always beckon. Lothar von Richthofen is recruited to command a fighter group on the first of the new Jump Carriers, Alpha. In 1921 they will both have their challenges.