In fact, looking at the world map before June 22, 1941, Hitler had no more countries to fight. France had already established Vichy France to help it manage most of the French territory.
The war against the Nordic countries, Sweden and Denmark, had ended long before 1941, and Sweden had not attacked Germany because of its important trade and financial reserves, while Finland had signed an entente and became a puppet state. Except for the British who are still struggling to insist, the rest are surrenders, puppet puppets, and the Soviet Union is left with a big problem. In addition to the Barbarossa plan, all that remained was the Sea Lion Plan to land in Britain, in fact, the Sea Lion Plan was never in the conditions for implementation, and the German army did not have the ability to cross the sea to land in Britain, or to airdrop paratroopers in the British mainland, hitler also knew this. And when attacking Britain, will the Soviets really be honest? Everything is an unknown.
In fact, most people know about the Barbarossa Plan drawn up by Hitler and his staff, but few remember the Soviet Plan of Attack on Germany before the Outbreak of the Great Patriotic War, the "Great Thunderstorm" plan. In this plan, the participants included Zhukov, Timoshenko and others, all very important generals worked together, and finally even the details of the attack and the troops participating were determined, and a total of 12 armies participated in the attack on Germany. The most important point is that the planned attack time is June 12! 10 days ahead of Plan Barbarossa! Fortunately, this plan was eventually rejected by Stalin, because with the current quality of the Red Army and combat capabilities, it was not yet possible to complete this battle plan.
But this plan also showed that even if Germany really had no intention of using the Soviet Union, would the Soviets really be foolish to abide by the friendly agreement? It is impossible, both sides are secretly sharpening their knives and preparing to slaughter each other, it is only a matter of time. Stalin himself made the judgment that the Soviet Union could first form a combat force sufficient to attack the German army before 1943, but the German army attacked too early, he did not expect it.
In addition, the oil and steel produced by the Soviet Union in Eastern Europe were also what Hitler wanted the most, because neither in the areas controlled by Germany nor in the puppet states, there were no large oil fields and oil reserves, and iron ore could not be obtained. As mentioned above, the reason why Hitler did not attack Sweden was because there was an important trade, which was the iron ore trade, and until Germany's defeat, Germany and Sweden had a large iron ore trade.
But Sweden's supply of iron ore to Germany could not meet the needs of German industry. Germany has neither oil nor iron ore, and there is a country on the "present border" with abundant iron ore and oil resources, and this country can now still hit him, and he is not ready, and he plans to fight you. Do you choose to sit in France and look out over the sea, or do you choose to attack the biggest threat to yourself first? The results must be clear.