It's okay. Not a lot of newbie Chinese (those who came over after the overturn of the Chinese Exclusion Act) know about this either. It's just not taught to anyone unless you specifically take Asian American History classes in college/uni. It's left out on purpose so that if you don't search for it, you'll never know about it. You literally had to go to college and specifically pay money to enroll in a specialized class to learn it, otherwise it's just buried history.