Complex sentence: In desperation, Krüger returns to HQ to make a personal appeal to the general for more reinforcements, but on arrival he finds that the building has been taken over by the SS and Von Brock has been arrested for being "defeatist".
Split into simpler sentences: In desperation, Krüger returns to HQ to make a personal appeal to the general for more reinforcements. But on arrival he finds that the building has been taken over by the SS and Von Brock has been arrested for being "defeatist".