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Stavka (Russian: Ставка) was the term used to refer to a command element of the armed forces from the time of the Kievan Rus′, more formally during the history of Imperial Russia as administrative staff and General Headquarters during late 19th Century Imperial Russian armed forces and those of the Soviet Union. In western literature it is sometimes incorrectly written STAVKA in uppercase, although the word is not an acronym. The term may be applied to personnel of the military Staff, as well as to military Staff location.
Stavka of the Commander-in-chief during World War I 
The commander-in-chief of the Russian army at the beginning of World War I was Grand Duke Nicholas Nicholaievitch, a grandson of Tsar Nicholas I. Appointed at the last minute in August 1914, he played no part in formulating the military plans in use at the beginning of the war. He was competent, if not brilliant. Nikolai Yanushkevich was his chief of staff. In the summer of 1915 the Tsar himself took personal command, with Mikhail Alekseyev as his chief of staff.
The Stavka was divided into several departments:
- Department of General-Quartermaster (Operations department)
- Department of General on Duty (Organisation of troops, supplies, promotions, staff matters)
- Department of military transportations
- Naval department
- Diplomatic chancery (liaison with the Ministry of Foreign Affairs)
Chiefs of Staff 
- 19.07.1914—18.08.1915: Lieutenant-General (from 22.10.1914, General of Infantry) Nikolai Yanushkevich
- 18.09.1915—01.04.1917: General of Infantry (from 1916-Adjutant General) Mikhail Alekseyev
- 10.11.1916—17.02.1917: General of Cavalry Vasily Gurko
- 11.03.1917—05.04.1917: General of Infantry Vladislav Klembovsky
- 05.04.1917—31.05.1917: Lieutenant-General Anton Denikin
- 02.06.1917—30.08.1917: Lieutenant-General Alexander Lukomsky
- 30.08.1917—09.09.1917: General of Infantry Mikhail Alekseyev
- 10.10.1917—03.11.1917: Lieutenant-General Nikolay Dukhonin
- 03.11.1917—07.11.1917: Major General Mikhail Dieterichs
- 07.11.1917—02.1918: Major General Mikhail Bonch-Bruevich
Stavka of the RKKA during World War II 
Stavka of the Soviet Armed Forces during World War II, or the headquarters of the "Main Command of the Armed Forces of the USSR" (Stavka Glavnogo Komandovaniya) (Russian: Ставка Главного Командования Вооруженных Сил Союза СССР), was established on June 23, 1941 by the top secret decree signed by Joseph Stalin in his capacities both as the head of government and as the leader of the Communist Party of the Soviet Union. According to this decree Stavka was composed of the defence minister Marshal Semyon Timoshenko (as its president), the head of General Staff Georgy Zhukov, Stalin, Vyacheslav Molotov, Marshal Kliment Voroshilov, Marshal Semyon Budyonny and the People's Commissar (Narkom) of the Navy Admiral Nikolai Gerasimovich Kuznetsov.
The same decree organized at Stavka "the institution of permanent counsellors of Stavka" : Marshal Kulik, Marshal Shaposhnikov, Kirill Meretskov, head of the Air force Zhigarev, Nikolay Vatutin, head of Air Defence Voronov, Mikoyan, Kaganovich, Lavrenty Beria, Voznesensky, Zhdanov, Malenkov, Mekhlis.
Very soon afterwards the deputy defence minister army Meretskov was arrested following the false charges by Beria and Merkulov. Meretskov was subsequently released from the jail and on the same day at the end of the first week of September 1941 was called for by Stalin.
Stavka of the Main Command was reorganised into the Stavka of the Supreme Command (Stavka Verkhovnogo Komandovaniya) on 10 July 1941. On 8 August 1941 it was again reorganised into Stavka of the Supreme Main Command (Stavka Verkhovnogo Glavnokomandovaniya).
On the same day Strategic Directions commands were instituted.