T-10
From Tardis Wiki, the free Doctor Who reference
The T-10 was a type of tank created by the Soviet Union around 1952.
A time eddy once captured a group of T-10s and placed them in the Battle of Waterloo in 1815, where they caused a massacre. The Ninth Doctor admonished Audrey Mohinson, who was responsible for the eddies, for her actions but she remained impassive about the outcome of the battle remaining the same. (AUDIO: Cataclysm)
When the Doctor changed the timeline to stop the effects of the time eddies for good at an earlier point, the retroactive fixes to time meant that none of these events had ever happened. (AUDIO: Food Fight)
