On March 1936, Hitler took what for him was a huge gamble - he ordered that his troops should openly re-enter the Rhineland thus breaking the terms of Versailles
May 10, 1940–June 22, 1940 Germany attacks western Europe—France and the neutral Low Countries. Luxembourg is occupied on May 10; the Netherlands surrenders on May 14; and Belgium surrenders on May 28. On June 22, France signs an armistice agreement by which the Germans occupy the northern half of the country and the entire Atlantic coastline. In southern France, a collaborationist regime with its capital in Vichy is established.
June 22, 1941–November 1941 Nazi Germany and its Axis partners (except Bulgaria) invade the Soviet Union. Finland, seeking redress for the territorial losses in the armistice concluding the Winter War, joins the Axis just before the invasion. The Germans quickly overrun the Baltic States and, joined by the Finns, lay siege to Leningrad (St. Petersburg) by September. In the center, the Germans capture Smolensk in early August and drive on Moscow by October. In the south, German and Romanian troops capture Kiev (Kyiv) in September and capture Rostov on the Don River in November.
December 7, 1941 Japan bombs Pearl Harbor. December 8, 1941 The United States declares war on Japan, entering World War II. Japanese troops land in the Philippines, French Indochina (Vietnam, Laos, Cambodia), and British Singapore. By April 1942, the Philippines, Indochina, and Singapore are under Japanese occupation.
The Battle for Stalingrad was fought during the winter of 1942 to 1943. In September 1942, the German commander of the Sixth Army, General Paulus, assisted by the Fourth Panzer Army, advanced on the city of Stalingrad. His primary task was to secure the oil fields in the Caucasus and to do this, Paulus was ordered by Hitler to take Stalingrad. The Germans final target was to have been Baku.
In April 1945, as Russian and German troops fought — savagely, street by street — for control of the German capital, it became increasingly clear that the Allies would win the war in Europe.