When I was young I believed that gorillas fought in wars overseas. I used to watch news reports closely but never managed to actually catch sight of the gorillas the reporters were talking about. It was really upsetting when I realised they meant 'guerrillas' and Planet of the Apes wasn't based on a real place.
A childhood belief about wars

you weren't the only one
83 of you believed this
- I thought “guerrilla tactics” meant fighting like a gorilla— beating your chest and that sort of thing.— Kai
- I was convinced that Gorilla soldiers in Vietnam in the 70's were real Gorillas attacking other Soldiers.— Mario
- that Guerilla Warfare was called "Gorilla Warfare" and it's about fighting gorillasAnon
- From a TV news program about freedom fighters, I though that `Gorrillas` could use guns.— adrian
- That "guerilla warfare" involved real Gorillas.— Geoffrey
- I used to beleive that gorilla wars were fought by gorillas.— Professor Luke