Complex sentence: During the night of 28 April, General Wenck reported to Keitel that his Twelfth Army had been forced back along the entire front and it was no longer possible for his army to relieve Berlin.
Split into simpler sentences: During the night of 28 April, General Wenck reported to Keitel that his Twelfth Army had been forced back along the entire front. According to Wenck, it was no longer possible for his army to relieve Berlin.