Here are 17 wars sparked by remarkably petty or absurd reasons:
The Football War (1969) – El Salvador and Honduras went to war after violent clashes at World Cup qualifying matches, though the real causes were overpopulation and anti-immigrant tension.
The Pastry War (1838) – France blockaded every Mexican port after the Mexican government refused to compensate a French pastry chef whose shop was ransacked.
The Pig War (1859) – An American farmer shot a British settler's pig for eating his potatoes on San Juan Island, nearly triggering a US-UK war. It remains the conflict's only casualty.
The Emu War (1932) – The Australian military deployed machine guns against 20,000 emus destroying crops. The birds largely won.
The War of the Scilly Isles (1651–1986) – A Dutch admiral declared war on this English archipelago over royalist privateers. Not a shot was fired, but with no peace treaty signed, the "war" technically lasted 335 years until a symbolic peace was signed in 1986.
Huéscar vs. Denmark (1809–1981) – A small Spanish town declared war on Denmark; 172 years passed with zero battles or casualties before peace was finally made.
The Chaco War (1932–1935) – Bolivia and Paraguay fought bitterly over a largely worthless desert region, resulting in tens of thousands of deaths for a territory that turned out to have little strategic value.
The Battle of Castelfidardo mishap – WWI Germans withdrew two battalions from combat because of a rumor about Cossack reinforcements that turned out to be false, weakening their line for nothing.
The Battle of Toulouse (1814) – Wellington's and Soult's forces fought a bloody battle two weeks after Napoleon had already abdicated — neither side had gotten the news yet.
The Battle of New Orleans (1815) – Fought after the peace treaty ending the War of 1812 had already been signed, simply because news hadn't crossed the Atlantic in time.
The Whiskey-fueled "Danish-Canadian War" over Hans Island – Denmark and Canada traded flag plantings and bottles of schnapps/whisky on a barren Arctic rock for decades in a good-natured territorial dispute (resolved diplomatically in 2022).
The War of Jenkins' Ear (1739) – Britain declared war on Spain after a Spanish coast guard officer allegedly cut off a British smuggler captain's ear.
The Second Balkan War (1913) – Started largely over squabbling between former allies about dividing spoils from the First Balkan War; its outcome pushed Bulgaria toward the Central Powers in WWI.
The Battle of the Golden Stool (1900) – A British governor demanded to sit on the sacred Ashanti golden stool as a "throne," provoking an uprising in present-day Ghana.
The Anglo-Zanzibar War (1896) – The shortest war in recorded history (38–45 minutes), triggered by a succession dispute after a sultan died and his cousin seized power without British approval.
The Battle of the Bulge... of the Vatican (1943–1944) – Rome and the Vatican were mistakenly bombed multiple times by Allied aircraft in incidents nobody could later explain or take responsibility for.
Costa Rica's accidental invasion (1970s) – A Nicaraguan commander and his men wandered several kilometers into disputed Costa Rican territory by mistake, nearly sparking a border conflict.
Worth noting: several of these blend real historical events with exaggerated internet retellings, so details (especially death tolls and exact dates) vary by source — happy to dig deeper into any single one for verification.
