Initial invasions On 1 September 1939,
Germany invaded Poland from the west. which took place in over 30 towns and villages in the first month of the German occupation. The
Luftwaffe also took part by strafing fleeing civilian refugees on roads and by carrying out a bombing campaign. The Soviet Union assisted German air forces by allowing them to use signals broadcast by the Soviet radio station at
Minsk, allegedly "for urgent aeronautical experiments". Hitler declared at Danzig: '' depicting Hitler greeting Stalin after the
invasion of Poland, with the words: "The scum of the earth, I believe?" To which Stalin replies: "The bloody assassin of the workers, I presume?"; 20 September 1939. at the end of the invasion of Poland. At the centre are Major General
Heinz Guderian and Brigadier
Semyon Krivoshein. In the opinion of
Robert Service, Stalin did not move instantly but was waiting to see whether the Germans would halt within the agreed area, and the Soviet Union also needed to secure the frontier in the
Soviet–Japanese border conflicts. On 17 September, the
Red Army invaded Poland, violating the 1932
Soviet–Polish Non-Aggression Pact, and occupied the Polish territory assigned to it by the Molotov–Ribbentrop Pact. That was followed by co-ordination with German forces in Poland. Polish troops already fighting much stronger German forces on its west desperately tried to delay the capture of Warsaw. Consequently, Polish forces could not mount significant resistance against the Soviets. On 18 September,
The New York Times published an editorial arguing that "Hitlerism is brown communism, Stalinism is
red fascism...The world will now understand that the only real 'ideological' issue is one between democracy, liberty and peace on the one hand and
despotism, terror and war on the other." On 21 September, Marshal of the Soviet Union
Voroshilov, German military attaché General
Köstring, and other officers signed a formal agreement in Moscow co-ordinating military movements in Poland, including the "purging" of saboteurs and the Red Army assisting with destruction of the "enemy". Joint German–Soviet parades were held in
Lviv and
Brest-Litovsk, and the countries' military commanders met in the latter city. Stalin had decided in August that he was going to liquidate the Polish state, and a German–Soviet meeting in September addressed the future structure of the "Polish region". Soviet authorities immediately started a campaign of
Sovietisation of the newly acquired areas. The Soviets organised staged elections, the result of which was to become a legitimisation of the Soviet annexation of eastern Poland.
Modification of secret protocols , September 22, 1939. " of 28 September 1939. Map of Poland signed by Stalin and Ribbentrop (focused on the
Kresy) adjusting the German-Soviet border in the aftermath of
German and Soviet invasion of Poland. Eleven days after the Soviet invasion of the Polish
Kresy, the secret protocol of the Molotov–Ribbentrop Pact was modified by the
German–Soviet Boundary and Friendship Treaty, allotting Germany a larger part of Poland and transferring Lithuania, with the exception of the left bank of the River
Scheschupe, the "Lithuanian Strip", from the envisioned German sphere to the Soviet sphere. On 28 September 1939, the Soviet Union and German Reich issued a joint declaration in which they declared: On 3 October,
Friedrich Werner von der Schulenburg, the German ambassador in Moscow, informed
Joachim Ribbentrop that the Soviet government was willing to cede the city of
Vilnius and its environs. On 8 October 1939, a new German–Soviet agreement was reached by an exchange of letters between
Vyacheslav Molotov and the German ambassador. The
Baltic states of
Estonia,
Latvia, and
Lithuania were given no choice but to sign a so-called "Pact of Defence and Mutual Assistance", which permitted the Soviet Union to station troops in them. The Soviets formed the
Finnish Democratic Republic to govern Finland after Soviet conquest. The leader of the Leningrad Military District,
Andrei Zhdanov, commissioned a celebratory piece from
Dmitri Shostakovich,
Suite on Finnish Themes, to be performed as the marching bands of the Red Army would be parading through Helsinki. After Finnish defenses surprisingly held out for over three months and inflicted stiff losses on Soviet forces, under the command of
Semyon Timoshenko, the Soviets settled for an
interim peace. Finland ceded parts of
Karelia,
Kuusamo, and
Salla together with
Hanko leased as a
naval base (9% of Finnish territory), which resulted in approximately 422,000 Finns (12% of Finland's population) losing their homes. Soviet official casualty counts in the war exceeded 200,000 although Soviet First Secretary
Nikita Khrushchev later claimed that the casualties may have been one million. Around that time, after several
Gestapo–NKVD conferences, Soviet
NKVD officers also conducted lengthy interrogations of 300,000 Polish
POWs in camps that were a selection process to determine who would be killed. On 5 March 1940, in what would later be known as the
Katyn massacre, 22,000 members of the military as well as intellectuals were executed, labelled "nationalists and counterrevolutionaries" or kept at camps and prisons in western Ukraine and
Belarus.
Soviet Union occupies the Baltic states and part of Romania In mid-June 1940, while international attention focused on the
German invasion of France, Soviet NKVD troops raided border posts in
Lithuania,
Estonia and
Latvia. State administrations were liquidated and replaced by Soviet cadres, Germany began a campaign of "
Germanization", which meant assimilating the occupied territories politically, culturally, socially and economically into the German Reich. 50,000–200,000
Polish children were kidnapped to be Germanised. It was continued in May 1940, when Germany launched
AB-Aktion, More than 16,000 members of the intelligentsia were murdered in
Operation Tannenberg alone. Germany also planned to incorporate all of the land into
Nazi Germany. That effort resulted in the forced resettlement of two million Poles. Families were forced to travel in the severe winter of 1939–1940, leaving behind almost all of their possessions without compensation. As part of Operation Tannenberg alone, 750,000 Polish peasants were forced to leave, and their property was given to Germans. A further 330,000 were murdered. Germany planned the eventual move of ethnic Poles to
Siberia. Although Germany used forced labourers in most other occupied countries, Poles and other Slavs were viewed as inferior by Nazi propaganda and thus better suited for such duties. were transported to the Reich for
forced labour. All Polish males were made to perform forced labour. Poles and ethnic Jews were imprisoned in nearly every camp of the
extensive concentration camp system in German-occupied Poland and the Reich. In
Auschwitz, which began operating on 14 June 1940, 1.1 million people perished.
Romania and Soviet republics In the summer of 1940, fear of the Soviet Union, in conjunction with German support for the territorial demands of
Romania's neighbours and the Romanian government's own miscalculations, resulted in more territorial losses for Romania. Between 28 June and 4 July, the
Soviet Union occupied and annexed Bessarabia, Northern Bukovina and the
Hertsa region of Romania. On 30 August, Ribbentrop and Italian Foreign Minister
Galeazzo Ciano issued the
Second Vienna Award, giving
Northern Transylvania to Hungary. On 7 September, Romania ceded
Southern Dobruja to Bulgaria (
Axis-sponsored
Treaty of Craiova). After various events over the following months, Romania increasingly took on the aspect of a German-occupied country. and
deported between 350,000 and 1,500,000, of whom between 250,000 and 1,000,000 died, mostly civilians. Forced re-settlements into
gulag labour camps and
exile settlements in remote areas of the Soviet Union occurred. almost half of them were dead by July 1940.
Further secret protocol modifications settling borders and immigration issues On 10 January 1941, Germany and the Soviet Union signed an
agreement settling several ongoing issues. Secret protocols in the new agreement modified the "Secret Additional Protocols" of the
German–Soviet Boundary and Friendship Treaty, ceding the Lithuanian Strip to the Soviet Union in exchange for US$7.5 million (). The agreement formally set the border between Germany and the Soviet Union between the Igorka River and the Baltic Sea. It also extended trade regulation of the
1940 German-Soviet Commercial Agreement until 1 August 1942, increased deliveries above the levels of the first year of that agreement, settled trading rights in the Baltics and Bessarabia, calculated the compensation for German property interests in the Baltic states that were now occupied by the Soviets and covered other issues. It also covered the migration to Germany within months of ethnic Germans and German citizens in Soviet-held Baltic territories and the migration to the Soviet Union of Baltic and "White Russian" "nationals" in the German-held territories. ==Soviet–German relations==