The naval war around New Guinea became a nightly brawl between _daihatsu_ and PT, and the torpedo function of the PT shriveled. Eventually many of the boats abandoned their torpedo tubes entirely and placed them with 37-mm. and 40-mm. cannon and extra 50-caliber machine guns, fine weapons for punching through a _daihatsu’s_ armor. The PT in New Guinea gradually changed its main armament from the torpedo—a sledge-hammer type of weapon for battering heavy warships—to the multiple autocannon—a buzz-saw type of weapon for slicing up small craft.
At the Buna-Gona-Sanananda battlefield, the Japanese were dying of starvation. It was the story of Guadalcanal again—with supply from the sea cut off by aggressive American patrols, the emperor’s infantry—no matter how desperately brave—could not stand up to a long campaign.
The night between January 17th and 18th, the _Roaring Twenty_ (PT 120) caught three barges trying to slip out of Sanananda. The PT recklessly took on all three in a machine-gun duel, sank two of them, and set the third afire. PT sailors were the first to know that the end had come for the Japanese ashore, because the barges were loaded with Japanese officers trying to slip away from their doomed men. Next day Sanananda fell to the Australians.
When both the base at Sanananda, on the turkey’s tail, and Guadalcanal fell to the Allies in the first months of 1943, the Japanese tried to slam an impenetrable gate across the path of the Allied advance. The eastern hinge of the gate was to be the mighty naval base and airfield complex at Rabaul, on the island of New Britain. The western hinge was planned for the place where the turkey’s tail joins the turkey’s back, an indentation of the New Guinea coastline called Huon Gulf.
To build up the western hinge of the gate, the Japanese landed at the ports of Lae, Salamaua, and Finschhafen, on the Huon Gulf. The Japanese wanted Huon Gulf so badly that they even dared send a fleet of surface transports to ferry 6,900 reinforcements across the Bismarck Sea to New Guinea. The convoy run was daring, because it would be within reach of land-based Allied bombers almost the whole way.
Escorting the eight transports were eight destroyers, veterans of the Tokyo Express. Tanaka, however, was no longer with them. He had been relieved of his command for telling the high navy brass in Tokyo some unpleasant truths. He spent the rest of the war on the beach as a penalty for speaking up about mistakes made at Guadalcanal.