Battle of Zaruthstra
From Tardis Wiki, the free Doctor Who reference
The Battle of Zaruthstra was a conflict that took place in the year 4037. It is known that one side were human. The disgraced Sontaran Commander Strax acted as a Nurse for this side, tending to soldiers from the battlefield. The Eleventh Doctor's TARDIS landed here and summoned Strax, who owed him a debt, to help in his mission to rescue Amy Pond and her baby at Demons Run. (DW: A Good Man Goes to War)
