The following outline is provided as an overview of and topical guide to the Russo-Ukrainian War: Russo-Ukrainian War – ongoing international conflict between Russia, alongside Russian-backed separatists, and Ukraine, which began in February 2014.

Following Ukraine's Revolution of Dignity, Russia annexed Ukrainian Crimea and supported pro-Russian separatists fighting the Ukrainian military in the Donbas war.

The first eight years of conflict also included naval incidents, cyberwarfare, and heightened political tensions.

Overviews Areas An oblast (/ˈɒblæst/; also UK: /ˈɒblɑːst/; Ukrainian, Russian: область) is a type of administrative division within the Russian empire and Soviet Union that continues to be used in Russia and some post-Imperial/Soviet states.

An alphabetical list of military units involved in a significant way the war.