Complex sentence: In June 1941 and now as part of army Group South the Division too part in the invasion of the Soviet Union and was involved almost continuously in offensive and defensive engagements throughout 1941 including the first Winter on the Eastern Front.
Split into simpler sentences: In June 1941, now as part of Army Group South, the Division took part in the invasion of the Soviet Union. It was involved almost continuously in offensive and defensive engagements throughout 1941, including the first Winter on the Eastern Front.