Mestizos moved in establishing themselves and intermarrying with the locals. Mongols were forbidden from speaking Chinese languages or intermarrying with the Han Chinese. The Boone and Carson families became good friends, working and socializing together, and intermarrying. A fourth ethnic element interacting and intermarrying are the Thracians (7.3.2). Throughout history one can find countless examples of these communities intermarrying with each other. Intermarrying between groups was common and in many cases encouraged. Some of the Portuguese sailors stayed permanently, trading and intermarrying with the local people.