There are a lot of bad things covered in our schools, but that wasn't one of them. I learned about it from an HBO show, sadly enough. We did learn a lot about the massacre of the Native Americans. I certainly don't know much about other countries checkered past, but something tells me they editorialize their history when they can. Heck, I know the UK wouldn't have time for Maths if they tried to cover all the terrible shit they've done (I know the US wouldn't either).