Franco-Prussian War
From Tardis Wiki, the free Doctor Who reference
The Franco-Prussian war was a conflict on Earth between the Second French Empire and Prussia. The war ended with a disastrous defeat for the French. Emperor Napoleon III was ousted, and the Third French Republic was proclaimed as a direct result of the war's resolution. (PROSE: World Game)
According to one account, the War Lords incorporated combatants from the Franco-Prussian War in the War Games. (PROSE: Doctor Who and the War Games)