Complex sentence: Their missions were classified; they dressed in civilian clothing made in East and West Germany, and carried appropriate non-American documentation and identification later, many of its members went on to help form Delta Force (Det A did not itself become Delta Force).
Split into simpler sentences: Their missions were classified; they dressed in civilian clothing made in East and West Germany, and carried appropriate non-American documentation and identification. Many of its members later went on to help form Delta Force (Det A did not itself become Delta Force).