在納粹進攻蘇聯之前，蘇德關係是非常好的。雖然希特勒整天把反共掛嘴邊上，但是受到西方排擠的德國很自然就跟同樣受到排擠的蘇聯走到一起。畢竟都是社會主義。雖然現在說希特勒是極右，斯大林是極左，其實二者沒有區別。
這裏是維基的蘇德關係詞條解釋。我的曆史是在西方學的，所以可能話一出口會引起很多受中共曆史觀影響的網友的吐槽。先說SORRY
Rumors of a secret military supplement to the treaty soon spread. However, for a long time the consensus was that those rumors were wrong, and that Soviet-German military negotiations were independent of Rapallo and kept secret from the German Foreign Ministry for some time.[15] This point of view was later challenged.[17][18][19] On November 5, 1922, six other Soviet republics, which would soon become part of the Soviet Union, agreed to adhere to the Treaty of Rapallo as well.[20]
The Soviets offered Weimar Germany facilities deep inside the USSR for building and testing arms and for military training, well away from Treaty inspectors' eyes. In return, the Soviets asked for access to German technical developments, and for assistance in creating a Red Army General Staff.[21]
The first German officers went to Soviet Russia for these purposes in March 1922. One month later, Junkers began building aircraft at Fili, outside Moscow, in violation of Versailles. The great artillery manufacturer Krupp was soon active in the south of the USSR, near Rostov-on-Don. In 1925, a flying school was established near Lipetsk (Lipetsk fighter-pilot school) to train the first pilots for the future Luftwaffe.[2] Since 1926, the Reichswehr had been able to use a tank school at Kazan (Kama tank school) and a chemical weapons facility in Saratov Oblast (Tomka gas test site). In turn, the Red Army gained access to these training facilities, as well as military technology and theory from Weimar Germany.[22]
The Soviets offered submarine-building facilities at a port on the Black Sea, but this was not taken up. The Kriegsmarine did take up a later offer of a base near Murmansk, where German vessels could hide from the British. During the Cold War, this base at Polyarnyy (which had been built especially for the Germans) became the largest weapons store in the world.
