California Gold Rush

The California Gold Rush (1848-1855) was a period of history in the United States that saw many gold prospectors journey to California. It was marred by violence, including genocide perpetrated on the indigenous peoples of the Great Basin Desert.

John Sutter owned the mill where gold was first struck, and treated the Maidu people appallingly. In 1852, he was robbed by an Assassin in his carriage while traveling through the Great Basin, who wanted to take the gold with him back to the Maidu.

Reference

 * Assassin's Creed issue 1