The rise of Nazism and Fascism in Europe, which was followed by German and Italian aggression on different countries, finally ending with German attack on Poland on September 1st, 1939.
Explanation:
Suddenly and without a declaration of war, the German armed forces made a strong attack on Poland on September 1, 1939. German aviation attacked Polish aviation at airports, anti-aircraft batteries, train stations and other major facilities to prevent the mobilization and concentration of Poles on the border front.
Having inflicted enormous losses on the Polish aviation in these attacks and increasing her air superiority in shouts, she then provided great assistance to the ground forces.
All German armies launched a general offensive on the morning of September 1st on the front line from East Prussia to Slovakia, fighting the persistent resistance of brave but few field crews defending the border fortifications. Thanks to the surprise, great superiority, successful operation and cooperation of their aviation, the German ground forces achieved decisive success in the first three days.
The strongest 10th German army achieved the greatest success, which skillfully exploited the initial successes and sent fast divisions to Warsaw.
