Complex sentence: In July 2014, negotiations commenced between Boeing and the Department of Defense for integration of the AGM-84 Harpoon Block 1G anti-ship missile onto the P-8A on behalf of Australia, which is reportedly a matter of interfacing with the aircraft's combat system software.
Split into simpler sentences: In July 2014, negotiations commenced between Boeing and the Department of Defense for integration of the AGM-84 Harpoon Block 1G anti-ship missile onto the P-8A on behalf of Australia. The missile's integration is largely a matter of interfacing with the aircraft's combat system software.