Complex sentence: In the last months of World War II, Haigerloch was the location of part of the German nuclear programme, with the use of nuclear fission towards building an atom bomb which did not succeed by the end of the war.
Split into simpler sentences: In the last months of World War 2, Haigerloch was the location of part of the German nuclear programme, with the use of nuclear fission towards building an atom bomb. This, however, did not succeed by the end of the war.