Governments of China and the United States of America, Treaty Regulating Immigration from China (1880)
“ ARTICLE III. If Chinese laborers, or Chinese of any other class, now wither permanently or temporarily residing in the territory of the United States, meet with ill treatment at the hands of any other persons, the Government of the United States will exert all its power to devise measures for their protection and to secure to them the same rights, privileges, immunities, and exemptions as may be enjoyed by the citizens or subjects of the most favored nation, and to which they are entitled by treaty. ”
