What is something they say happened but never happened actually?

She took his spores. All women are whores.

The Holobunga

Men didn't really go to war for women. That idea is mostly a myth. Wars were fought for much more practical reasons like land, power, resources, or politics. The whole 'fighting for women' thing is just a romanticized way of making war sound more appealing and help men feel more dedicated to the cause.

Microbes being proven to cause disease

There was no second incident in the Gulf of Tonkin. It was fabricated to start a war with Vietnam.