2014 pro-Russian unrest in Ukraine

From the end of February 2014, in the aftermath of the Euromaidan and the Revolution of Dignity, which resulted in the ousting of Russian-leaning Ukrainian president Viktor Yanukovych, demonstrations by Russian-backed, pro-Russian, and anti-government groups (as well as pro-government demonstrations) took place in Crimea, Donetsk, Luhansk, Kharkiv, and Odesa. The unrest, which was supported by the Russian military and intelligence services, belongs to the early stages of the Russo-Ukrainian war.

Source: Wikipedia — 2014 pro-Russian unrest in Ukraine (CC BY-SA 4.0)