World War Gnome, also known as the Gnomalian Civil War, was an armed conflict between all of the countries of the Gnomalian Alliance, sparked by Dolphinstan's attempt to disunite the Alliance and conquer Gnomalia, although they did not know this at the time. The war ended in a victory for the "Axis Powers" of Juicemony, CHINa, and Dolphinstan, and a major loss for the "Central Powers" of Nortmaydia, Maco-Courtnorium and Dilexico.

The war began when Juicemony demanded Nortmaydia open up their trade to Juicemony, after they had blocked it near the beginning of the Gnomalian Cold War.