The armed conflict in eastern Ukraine has been going on since Spring 2014. The inhabitants of the region had refused to acknowledge the nationalist coup d’état of February in Kyiv and announced the establishment of the self-proclaimed People’s Republics of Donetsk and Luhansk.
There was no coup d’état in Kyiv in 2014. This is a longstanding pro-Kremlin disinformation narrative about Ukraine's Euromaidan protests.
The spontaneous onset of the Euromaidan protests was a reaction by several segments of the Ukrainian population to former President Yanukovych’s sudden departure from the promised Association Agreement with the European Union in November 2013. See the full debunk here.