1On April 7, 944, the Soviet Red Army launched a strategic attack on the right bank of Ukraine for four consecutive months, ending in crushing the entire southern wing of the German Eastern Front (excluding the German army 17, which was blocked in Crimea). This attack was one of the biggest battles in World War II, and the length of the front line was 1300 to 1400 kilometers. About 4 million people, 45,400 guns and mortars, 4,200 tanks and self-propelled guns (assault guns), and more than 4,000 aircraft participated in various wars in Ukraine on the right bank. This is the only battle in which all six tanks of the Soviet Red Army participated in the war at the same time. During the attack, the 10 division and 1 brigade of the "Southern" Army Group and the "A" Army Group were annihilated. Its 59 divisions lost 1/2 to 3/4. The Red Army of the Soviet Union advanced 250-450 kilometers, which cut off the southern wing of the German strategic front because it went out to the foothills of Carpathian Mountain. The guerrillas cooperated effectively with the army. They attacked the Germans from the rear, destroyed their communication lines, seized ferries and collected important information. During the attack, the Soviet Red Army crossed many rivers in the March under the conditions of spring flood and ice flow, including Inguletz River, Nanbuge River, Dniester River, Prut River and other wide rivers. In the winter and spring of 1944, the air force group army of the Fourth Army of Ukraine dispatched more than 66,000 sorties, which was 1 times more than the German aviation (about 3 1000 sorties), providing effective support for the army. They destroyed1more than 400 planes in air battles and airports. In April 17, the transport aviation unit dispatched 48 17 sorties, transported 670 tons of oil and ammunition, and supplemented more than 5,000 soldiers and wounded people. One of the most important achievements of this strategic attack was the liberation of millions of Soviet troops and a large territory of Ukraine on the right bank. The Red Army of the Soviet Union went out to the southwest border of the Soviet Union and transferred its operations abroad.