Napoleonic Wars
From Tardis Wiki, the free Doctor Who reference
The Napoleonic Wars were fought in Europe in the early 19th century.
The War Lords kidnapped soldiers from Napoleon's Russian campaign for their war games. (DW: The War Games)
The Second Doctor prevented the Players from altering the outcome of the Napoleonic Wars. (PDA: World Game)
Behind the scenes
According to The Terrestrial Index, a non-narrative source, the Napoleonic Wars may have been exacerbated when the Nemesis statue passed Earth in 1813. (REF: The Terrestrial Index)
