In Warrior Season 3, there's been a lot of politics at play in San Francisco. The late 1800s is finding many seedy men with power making moves, including Mayor Buckley, Leary and Strickland. They all want to consolidate and ensure white supremacy rules, booting out the Chinese from American society.
Source:https://www.cbr.com/warrior-game-of-thrones-red-wedding-moment/