Complex sentence: In 1945, Walter was awarded the Knight's Cross for his wartime service, but the end of the war saw all of his research materials confiscated by the British military and Walter and his colleagues taken to the UK to work for the Royal Navy.
Split into simpler sentences: In 1945, Walter was awarded the Knight's Cross for his wartime service. The end of the war saw all of his research materials confiscated by the British military and Walter and his colleagues taken to the UK to work for the Royal Navy.