World War IV
From Tardis Wiki, the free Doctor Who reference
World War IV was a war fought on Earth prior to the 25th century which affected London. Vicki Pallister noted that there had been four World Wars in London's history by that time and that St Paul's Cathedral still stood in the 25th century, having survived the four World Wars as well as the 2150s Dalek invasion of Earth. (AUDIO: Frostfire) It was the last world war on Earth until World War V, which was fought either in the 49th century (AUDIO: Singularity) or by the time of the 37th century. (COMIC: Art Attack)