左岸ウクライナ
The Chorna rada of 1663 () was a Cossack Rada meeting on 17–18 June, 1663 near Nizhyn, Ukraine, where thousands of common Cossacks, Zaporozhians, Ukrainian peasants, including the Cossack starshyna, where assembled to elect a new Hetman of Left-bank Ukraine. The main candidates were Acting hetman Yakym Somko, Nizhyn colonel Vasyl Zolotarenko, and Koshovyi Otaman Ivan Briukhovetsky.