The Tenth Sontaran Battle Fleet, also known as the Tenth Sontaran Fleet, was a Sontaran military unit commanded by General Staal and sent into Earth orbit in the early 21st century during the Sontaran invasion of Earth. The Sontarans planned to turn Earth into a cloning world. Command of the fleet took place from the flagship, which had many smaller support craft. The invasion failed, however, and the entire battle fleet was destroyed, save one, by the Tenth Doctor and Luke Rattigan.

Luke Rattigan plotted with the Sontarans to assist them with the installation of ATMOS, designed to turn the atmosphere of Earth poisonous. The fleet waited, with the General in the flagship which had a teleport pod link to the Rattigan Academy near London, which Luke had created.

The flagship was destroyed by Rattigan after he sacrificed himself to end the invasion, as the fleet prepared to fire upon the planet. The explosion of the flagship destroyed the smaller craft around it. Because of the intervention of the Tenth Doctor, his companions and UNIT, the ATMOS plan had already failed. (TV: The Sontaran Strategem / The Poison Sky) Though thrown off course by the blast, one Sontaran spacepod and its pilot, Commander Kaagh survived and crash-landed onto Earth. Alone on the planet, Kaagh attempted then to destroy Earth on his own. (TV: The Last Sontaran) Two other spacepods, the ones of Commander Tarx and Commander Lohr, were too close to the flagship and exploded. (PROSE: The Last Sontaran)

Parallel world Edit

In a parallel world, the three members of Torchwood Three, namely Jack Harkness, Ianto Jones and Gwen Cooper, destroyed the fleet. Ianto and Gwen died and the immortal Jack Harkness was teleported to the Sontaran home planet of Sontar. (TV: Turn Left)

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