Battle of Zaruthstra

The Battle of Zaruthstra was a conflict that took place in the year 4037. One side were human. The disgraced Sontaran Commander Strax acted as a nurse for this side, tending to soldiers from the battlefield. The Doctor's TARDIS landed there to summon Strax, who owed him a debt, to help in his mission to rescue Amy Pond and her baby at Demon's Run. (DW: A Good Man Goes to War)