Gen. Douglas MacArthur, commander of Pacific forces in World War II, viewed the Battle of the Bismarck Sea as a disaster for the Japanese and a triumph for the Allies. In that great air-sea confrontation, U.S. and Australian air forces proved that air power could be decisive in preventing the resupply of ground troops by sea. Months of torturous warfare in the jungles of New Guinea had left Japanese troops vulnerable to disease and starvation. In the end, Allied airmen were able to break Japan's grip on New Guinea and end its threat to Australia through the innovative and aggressive use of air power. MacArthur's strength lay in a dedicated and courageous band of airmen who could attack enemy ships from all directions at any time.