 The U.S. PT boats did not sortie to attack Hashimoto 's force this night and the loading went uneventfully . The Reinforcement Force embarked Hyakutake , his staff , and 3 @,@ 921 men , mainly from the 2nd Division , and reached Bougainville without incident by 12 : 50 on 5 February . A CAF airstrike launched that morning failed to locate Hashimoto 's force . 
