Complex sentence: The Zeus site, known as the Kwajalein Test Site, was officially established on 1 October 1960, and as it grew in size, eventually led to the entire island complex being handed over to the Army from the Navy on 1 July 1964.
Split into simpler sentences: The Zeus site, known as the Kwajalein Test Site, was officially established on 1 October 1960. As it grew in size, it eventually led to the entire island complex being handed over to the Army from the Navy on 1 July 1964.