Factbox-Who is Russia's 'General Armageddon' Surovikin, missing since mutiny?

FILE PHOTO: General Sergei Surovikin, commander of Russian forces in Ukraine, visits the Joint Headquarters of the Russian armed forces involved in military operations in Ukraine, in an unknown location in Russia, in this picture released December 17, 2022. Sputnik/Gavriil Grigorov/Kremlin via REUTERS

(Reuters) - Russian General Sergei Surovikin, not seen in public since a mutiny by Wagner mercenaries in late June, has been replaced as head of the air force, according to state news agency RIA.

Here are some key facts about the commander who was nicknamed "General Armageddon" by the Russian media for his reputed ruthlessness and also praised for his leadership.