Battle Fleet

Battle Fleets were war fleets operated by the Sontarans.

Battle Fleets
In 102, River Song reported four Sontaran Battle Fleets among the spaceships of the Pandorica Alliance above Earth. (TV: The Pandorica Opens)

Commander Stor led a Battle Fleet in the unsuccessful Sontaran invasion of Gallifrey. (TV: The Invasion of Time)

The newly cloned Strax was assigned to the Seventh Sontaran Battlefleet. (PROSE: A Soldier's Education)

Kygon Brox and his retinue belonged to the Eighth Battle Fleet. (COMIC: The Instruments of War)

Group Marshal Stike commanded the Ninth Sontaran Battle Fleet. (TV: The Two Doctors) This fleet was destroyed by the Master. (AUDIO: The Bekdel Test)

The flagship of the Tenth Sontaran Battle Fleet, commanded by General Staal, launched an invasion of Earth in 2009, only to be destroyed by Luke Rattigan. (TV: The Sontaran Stratagem/The Poison Sky) The fleet had been previously encountered by the Sixth Doctor, Tegan, and Gareth Jenkins, under the name Tenth Sontaran Battle Brigade. (HOMEVID: A Fix with Sontarans)

The Twelfth Sontaran Battle Fleet hijacked the Globe Games before being defeated by the Tenth Doctor. (PROSE: The Sontaran Games)

Vade was the Captain of the Fourth Sontaran Battle Fleet. (GAME: Legacy)

Other references
The Eleventh Doctor identified the Atraxi as a battle fleet. (TV: The Eleventh Hour)