The Battle of Zaruthstra was a conflict which involved the human race and took place in the year 4037. The disgraced Sontaran Commander Strax acted as a nurse, tending to those wounded in battle. The Eleventh 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. (TV: A Good Man Goes to War)

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