 Complete the following phrase:  Over a two-year period, this guerilla force raided and ambushed Japanese positions, pillaged supplies and destroyed ammunition dumps, killing more than 30 Japanese soldiers in the process. Although they managed to divert some Japanese forces and destroy their supplies, the highland lakes region was of little military importance. Nevertheless, it did allow the gathering of information on Japanese positions at Nabire, Timika, Fakfak and further west at Ambon, which proved useful during the 