In this, his second book, Churchward tells the story of the colonial expansion of Mu and the influence of the highly developed Mu culture on the rest of the world. Her first colonies were in North America and the Orient, while other colonies had been started in India, Egypt and Yucatan.
Anyway, to keep it simple, we know this is true history because it happened before there was history, so that's how we know it's true history . . . (Yes, it is pronounced like "moo," but it isn't spelled that way, because the cow didn't happen to be one of their gods, because they ate it.)