Little green men

The "little green men" were Russian soldiers who were masked and wore unmarked uniforms upon the outbreak of the Russo-Ukrainian War in 2014. They were active just before and during the Russian annexation of Crimea and carried regular weapons and equipment, but were always masked and wore distinctly unmarked green military fatigues. Russia, which had been denying any involvement in Ukraine prior to the annexation, used these little green men to give it plausible deniability on the international stage.

Between February and March 2014, these unmarked Russian soldiers occupied and blockaded the Simferopol International Airport, most of Ukraine's Crimean military bases, and the Supreme Council of Crimea. The name has also sometimes been used to refer to Russian troops during the War in Donbas; the Kremlin stated that no Russian troops were active in the region, but many little green men were operating in this region while disguised as pro-Russian separatists.