The history of the Australian American population almost follows the story of both British Americans and Irish Americans, as Australia was a British political territory at the time when they first immigrated and most of the settlers were English or Irish. The first wave of immigration from Australia to the United States came in the 1850s California Gold Rush when mostly Irish migrants who had escaped the Great Irish Famine had previously worked on the Australian goldfields. In San Francisco, the "Sydney Ducks" as they were known came into violent conflict with nativist locals.