Original sentence: However, once Germany attacked the Soviet Union they swung around to a pro-Allied view.The Communists were on the other hand loyal to the Soviet Union, and supported its Molotov-Ribbentrop Pact with Nazi Germany
Edited sentence: Once Germany attacked the Soviet Union they swung around to a pro-Allied view.The Communists were on the other hand loyal to the Soviet Union and its alliance with Nazi Germany, thus in the beginning of the war they demanded demobilisation and pro-Axis policies