Original sentence: As such it played a major role in Germany's early successes in the war, and formed a key part of the Blitzkrieg concept, much due to the use of the innovative Junkers Ju 87 dive bomber (Sturzkampfflugzeug—"Stuka").Germany swept through Poland, Norway, Denmark, Luxembourg, Belgium and France in a matter of months between September 1939 and June 1940 due in no small part to the Luftwaffe, which seemed invincible, causing Göring to become over-confident in its abilities and boasting that the RAF would be defeated in a matter of a month before the planned launch of Operation Seelöwe ("Sealion"), the invasion of the United Kingdom.Nevertheless, the vast land mass of Russia allowed the Soviets to manufacture war matériel well away from the front line and so it was partly due to overwhelming numbers of weapons made available to the ground and air forces of the USSR that the Soviets managed to push the Germans back west, especially after the crushing defeats of the German Army at both Kursk and Stalingrad and the Germans' failure to take Leningrad (St
Edited sentence: As such it played a major role in Germany's early successes in the war, and formed a key part of the Blitzkrieg concept, much thanks to the use of the innovative Junkers Ju 87 dive bomber (Sturzkampfflugzeug - "Stuka").Germany swept through Poland, Norway, Denmark, Luxembourg, Belgium and France in a matter of months between September 1939 and June 1940 thanks in no small part to the Luftwaffe, which seemed invincible, causing Göring to become over-confident in its abilities and boasting that the RAF would be defeated in a matter of a month before the planned launch of Operation Seelöwe ("Sealion"), the invasion of the United Kingdom.Nevertheless, the vast land mass of Russia allowed the Soviets to manufacture war matériel well away from the front line and so it was partly thanks to overwhelming numbers of weapons made available to the ground and air forces of the USSR that the Soviets managed to push the Germans back west, especially after the crushing defeats of the German Army at both Kursk and Stalingrad and the Germans' failure to take Leningrad (St