Soviet Union

Moscow

Flags 1939–1945

…1939
Soviet Union
simplified version (without arms)

Course of events

23 August 1939
Neutral / non-belligerent
Molotov–Ribbentrop Pact with Germany (23 Aug 1939).
17 September 1939
Other belligerents
Invaded Poland (17 Sept 1939), attacked Finland, annexed the Baltic states and Bessarabia — while bound by the pact with Germany.
22 June 1941
Allies
Attacked by Germany (Operation Barbarossa); joined the Allied coalition.

Events involving this country

23 Aug 1939Molotov–Ribbentrop Pact
1 Sept 1939Invasion of Poland (September Campaign)
17 Sept 1939Soviet invasion of Poland
30 Nov 1939Winter War
3 Apr 1940Katyn massacre
15 Jun 1940Soviet occupation and annexation of the Baltic states
28 Jun 1940Soviet occupation of Bessarabia and Northern Bukovina
22 Jun 1941Operation Barbarossa
25 Jun 1941Continuation War
10 Jul 1941Battle of Smolensk (1941)
23 Aug 1941Battle of Kiev (1941)
8 Sept 1941Siege of Leningrad
29 Sept 1941Babi Yar massacre
2 Oct 1941Battle of Moscow
30 Oct 1941Siege of Sevastopol (1941–1942)
12 May 1942Second Battle of Kharkov
28 Jun 1942Case Blue — German summer offensive 1942
17 Jul 1942Battle of Stalingrad
5 Jul 1943Battle of Kursk
26 Aug 1943Battle of the Dnieper
28 Nov 1943Tehran Conference
2 Feb 1944Battle of Narva (1944)
10 Jun 1944Vyborg–Petrozavodsk offensive
22 Jun 1944Operation Bagration
13 Jul 1944Lvov–Sandomierz offensive
1 Aug 1944Warsaw Uprising
20 Aug 1944Jassy–Kishinev offensive
23 Aug 1944King Michael's coup — Romania changes sides
29 Aug 1944Slovak National Uprising
15 Sept 1944Belgrade offensive
29 Dec 1944Siege of Budapest
12 Jan 1945Vistula–Oder offensive
13 Jan 1945East Prussian offensive
27 Jan 1945Liberation of Auschwitz
30 Jan 1945Sinking of the Wilhelm Gustloff
4 Feb 1945Yalta Conference
16 Mar 1945Vienna offensive
6 Apr 1945Battle of Königsberg
16 Apr 1945Battle of Berlin
5 May 1945Prague uprising
7 May 1945German Instrument of Surrender — end of the war in Europe
17 Jul 1945Potsdam Conference

Data completeness: borders c. 1938, status at country level; occupation zones, annexations and front lines as approximate snapshots. Units and offensives: selected, incomplete sets; archive: only items with a confirmed licence, still being added.