Original sentence: After a succesful German offensive, the Soviet Union's invasion from the east on September 17, 1939, ended any realistic hope of Polish conventional resistance.German personnel losses were about approximately 16,000 Killed in Action, while losing about 30% of their armored vehicles, while the Polish suffered around 65,000 Killed.Hitler had gambled wrong that France and Britain would let him annex parts of Poland without military reaction.However, Polish people provided important assistance to the Allies throughout the War, including the initial cracking of the Enigma machine by cryptologist Marian Rejewski, the assistance given by Polish pilots to the United    Kingdom in the Battle of Britain, and the costly victory over German forces at the Battle of Monte Cassino.Instead, it was being directly governed by a purely German administration, the Generalgouvernement.Poland never made a general surrender, nor did it produce a  puppet government that collaborated with the Germans.Though the German attack was a success, losses were higher than expected
Edited sentence: German personnel losses were about approx 16,000 KIA and the loss of about 30% of the German's armored vehicles was one of the main reasons an immediate attack westward was discarded.Instead her people provided crucial assistance to the Allies throughout the War, including the initial cracking of the Enigma machine by cryptologist Marian Rejewski, the assistance given by Polish pilots to the United    Kingdom in the Battle of Britain, and the costly victory over German forces at the Battle of Monte Cassino, to name a few.Poland never made a general surrender and was the only German-occupied country that did not produce a puppet government that collaborated with the Nazis.The Soviet Union's invasion from the east on September 17, 1939, ended any realistic chance of Polish conventional resistance