Complex sentence: Nonetheless, the Italian Government set to develop an indigenous missile, called Alfa, with a successful program, officially halted by Italian Nuclear Non-Proliferation Treaty ratification and failure of the NATO Multilateral Force.
Split into simpler sentences: Nonetheless, the Italian government set out to develop an indigenous missile, called Alfa. The program was successful, but was halted by Italy's ratification of the Nuclear Non-Proliferation Treaty and the failure of the NATO Multilateral Force.