Great Hoppledomian Fruit Fly War

From Tardis Wiki, the free Doctor Who reference

The Great Hoppledomian Fruit Fly War was a war fought amongst fruit flies on Hoppledom VI, on 8 June, 6492. The war would last for fifty generations, beginning at 10am, and concluding at 3.30pm that same afternoon. (PROSE: Time Traveller's Diary)