In 1813, the Battle of Leipzig, the French army led by Napoleon, suffered from the bad weather in Russia, and finally lost in this battle, since then Napoleon's dream of unifying Europe has been completely shattered, but only a hundred years later, the Leader of the Nazi Party Hitler, did not learn the lesson of the French, brazenly invaded, resulting in serious losses of the German army in the winter, and the tendency to win or lose after the Battle of Stalingrad began to reverse.
On June 22, 1941, Nazi Germany tore up the Soviet-German Non-Aggression Pact, gathered 190 divisions totaling 5.5 million men, and launched a surprise attack on the Soviet Union with its vassal forces. At this time, the Battle of Britain, which Nazi Germany launched against Britain, was not over. Therefore, many people imagine that Hitler did not invade the Soviet Union at that time, but continued to attack Britain, and whether the final outcome of World War II would change. The answer is yes, but it's more unpredictable.
From a strategic point of view, many readers believe that Hitler's approach is very unwise, it is obvious that he opened up two battlefields, so that he was attacked by the enemy on his stomach, but the justice of the war is not discussed, Hitler's vision of people, absolutely has his unique features, including reusing armored units, promoting generals such as Rommel Guderian, and his attack on the Soviet Union, also has full reasons.
The first is the loss of the Germans in the Battle of Britain, the navy has always been the strength of the British, on the contrary, the Germans can not control the sea, and in the air battle, the British have the dual support of land and sea forces, the German army is a unilateral and uncooperative attack, a total loss of 1977 aircraft, but also lost the right to attack, landing on the British mainland, which means that Nazi Germany has to pay a greater cost of casualties.
On the other hand, the Soviet Union was also a very dangerous opponent for Germany, and it can be said that in the early days of World War II, the role played by the Soviet army was not very glorious.
In mid-1939, Hitler and Stalin, through the foreign ministers of the two countries, expressed their "goodwill" to each other, thus signing the famous Soviet-German Non-Aggression Pact, in addition, the two sides also secretly divided Poland through this meeting, and as the German blitzkrieg began, the Soviet Union also entered the Republic of Poland to fight, and on September 17, the Nazi German army met in Brest, at this time the two countries were like a family, and on September 25 the two armies also held a joint military parade. Since the German invasion of Poland, while Britain and France were busy dealing with Hitler and completing two five-year plans, the Soviet Union greatly increased its national strength and immediately launched an invasion of Finland, which, despite heavy losses, still occupied a large part of Finland (which later forced Finland to fall to the Nazi camp).
After the signing of the agreement, although the German army swept across the European continent, the Soviets always let Hitler and the Nazi government in the throat, according to the World War II archives, before the Soviet-German war, the total mobilization of the Soviet army reached 4.2 million people, even higher than the German troops, in the Soviet-German border area, there were 170 divisions of 2.9 million people, 1540 aircraft, 1800 tanks waiting. However, it is surprising that when Hitler lightning invaded the Soviet Union, so many troops were completely unprepared for Hitler's attack, and Moscow was even more busy with the collapse of thousands of miles, and it was obvious that their tactics were not for defense, and the only reason for deploying so many troops was obvious.
Then it is not difficult to imagine what will happen in the future, although the United Kingdom only has the British Isles, in fact, there is Australia overseas. India and other colonies, a steady stream of ground staff and flying troops, as well as the retreat to the British mainland French and Belgian troops are also helping to resist the Nazi attack, for Hitler, is still an extremely difficult bone to gnaw, if he concentrates all his forces to attack Britain, the most likely consequence, is that the Soviet army with offensive tendencies to pick peaches. In that case, how would World War II end? No one knows.