Complex sentence: In a group of arrested insurgents he recognizes a former wartime comrade, whom Lang supports at first in front of his commander by pointing out his commitment at the front and the fact that he was awarded the Iron Cross.
Split into simpler sentences: In a group of arrested insurgents he recognizes a former wartime comrade, who Lang supports at first. He points out at his commander that his comrade was very committed at the front and that he was awarded the Iron Cross.