In fact, there are still many people who do not understand the German attack on the Soviet Union during World War II, and they believe that the two sides signed the "Soviet-German Non-Aggression Pact", and there must be a spirit of contract; if Germany does not attack the Soviet Union, but continues to attack Britain, or expands the achievements of North Africa, there is still great hope for occupying Africa and the Middle East. The reason is such a truth, on paper everyone can talk about soldiers, but the actual situation is obviously not so simple; the complexity of the international situation will not be clear for a while and a half, here is a brief chat, roughly why Germany attacked the Soviet Union.
In fact, Adolf's party, from the very beginning, was aimed at the Soviet system, and thus received sponsorship from Britain, France and the United States, and grew rapidly, because they were deeply aware of the threat of the Soviet Union; and Adolf did perform well in the early days of his power, so when Facing Germany's annexation of Austria, the Sudetenland, and Czechoslovakia, Britain and France only symbolically protested.
Why? They believed that Germany's strength had been reduced by the First World War and was already very weak; and Germany used their connivance to continue to expand itself until the war to divide Poland broke out, and Britain and France symbolically declared war on Germany, but only declared war, and did not make much practical moves, and even they believed that Germany and the Soviet Union bordered, and it should be Germany declaring war on the Soviet Union.
In fact, according to the nature of the party led by Adolf, it is true that it should immediately attack the Soviet Union; but Adolf did not, but first destroyed France and other opposing countries on the European continent, and even attacked Britain first, only because of the failure of the "Sea Lion Project", he prepared a large army to attack the Soviet Union. Why? Because Adolf did not dare to gamble, after all, the Soviet Union was populous and large, and it was not a matter of time and a half to want to take it, and it had to go all out, if other countries sneaked behind it, it would be really powerless to resist.
In short, Germany was not in a hurry to launch an offensive against the Soviet Union, and the two sides also signed the Soviet-German Non-Aggression Pact, which in fact, both sides knew was just a piece of waste paper, but it could also maintain a superficial peace. Why? Because when Germany began to expand, the Soviet Union knew that Germany's ultimate goal was itself, but the Soviet Union, which was in the second five-year plan at that time, could not afford or want to participate in these things, and it had more important things to do.
So in the beginning, the Soviet Union first came into contact with Britain and France, and also joined the League of Nations, and later signed the Soviet-French Treaty of Mutual Assistance with France in response to German aggression; but in 1939, when Britain, France, and the Soviet Union met, due to disagreement (mainly Britain), the negotiations broke down, and the Soviet Union had to abandon the policy of collective security. Although the Soviet Union abandoned its policy of collective security, this move at least proved that the Soviet Union was hostile to Germany, which was the first thing that made Adolf determined to attack the Soviet Union.
But international relations are even more hypocritical than human relations, and although the Soviet Union came to Germany to sign the Soviet-German Non-Aggression Pact when negotiations with Britain and France broke down, Germany still signed it with the Soviet Union. After all, signing such a treaty is not harmful to yourself, anyway, the so-called treaty is a piece of waste paper, tearing up more treaties, and you don't care about tearing up one more. And Germany took advantage of this opportunity to divide Poland with the Soviet Union and later capture the Balkans.
The Soviet Union, on the other hand, used this time to begin to expand itself, to form the Eastern Front, to expand its strategic depth, so that germany would be able to gain a certain buffer when it attacked itself in the future. The Soviet Union first divided Poland with Germany, then launched an invasion of Poland with Finland too close to Leningrad; then sent troops into the Baltic States, incorporating Lithuania, Estonia, and Latvia into the Soviet Union, and reclaiming the Area of Bessarabia, which had been occupied by Romania.
The reason why the Soviet Union continued to launch wars of expansion and established the Eastern Front, in addition to the desire for expansion in the bones of the Russians, there was also a large part of the factor to resist Germany, which was also known to both sides; this was also a key factor for Adolf to attack the Soviet Union immediately after the defeat of the attack on Britain, and he could not wait for the Soviet Union to be ready to attack; after all, the Soviet Union was constantly sending troops to the border line between the two sides, which was a very dangerous signal, in case he attacked Britain, If the Soviet Union had taken the lead in waging war, Germany would have been passive.
And what really made Adolf determined to attack the Soviet Union was because of the third thing, the third thing was the Soviet invasion of Poland; because the Soviet Union implicated more than 35,000 officers in the initial "Zonai" operation, more than 15,000 of whom were directly executed, which greatly affected the combat effectiveness of the Soviet army, so that in the invasion of Poland, 1.2 million Soviet troops at the cost of nearly 380,000 people were killed, barely defeated Finland with only 200,000 troops, of which Finland died less than 110,000.
This allowed the German army to see the weakening of the Soviet army's combat effectiveness, and then in the "Barbarossa Plan" it was also very bold to attack the Soviet Union in three ways. And it was true that as the Germans had expected, although the Soviet Union had a large number of defenders on the border, but the combat effectiveness was vulnerable, and the German three roads soon reached their respective target positions. However, due to the confusion of the command, as well as the desperate resistance of the Soviet army and the active assistance of Britain and the United States, the Soviet Union resisted the German offensive and entered a counter-offensive posture after eliminating a large number of German troops.