When the Second World War broke out in September 1939, the British asked Australia for help. With some misgivings, the Australian government sent five destroyers to beef up the British Royal Navy in the Mediterranean. HMAS Vendetta, Vampire, Voyager, Stuart and Waterhen were old ships, small with worn-out engines. Their crews used to joke they were held together by string and chewing gum; when the Nazi propaganda minister Josef Goebbels heard of them, he sneered that they were a load of scrap iron.

Thousands of miles from friendly ports, the US Navy had finally managed to complete the capture of Guadalcanal from the Japanese in early 1943. Now the Allies sought to keep the offensive momentum won at such a high cost. This is the central plotline running through this page-turning history beginning with the Japanese Operation I-Go and the American ambush of Admiral Yamamoto and continuing on to the Allied invasion of New Georgia, northwest of Guadalcanal in the middle of the Solomon Islands and the location of a major Japanese base. 

Established after World War I by the Royal Australian Navy, the Coast Watchers were a loose organisation of several hundred European settlers, missionaries, patrol officers and planters living in British and Australian Pacific Island territories whose job it was to observe and report on the enemy. They were mostly all unpaid volunteers whose job it was simply to observe and report on foreign shipping and aeroplane movements. It was never envisaged that the Coast Watchers would do any fighting, nor operate inside enemy-occupied territory.

Soon after the declaration of war on Japan, a secret military reconnaissance unit was established, based on the British Special Operations Executive (known as SOE) and called the Inter-allied Services Department. The unit was tasked with the role to "obtain and report information of the enemy...weaken the enemy by sabotage and destruction of morale and to lend aid and assistance to local efforts to the same end in enemy occupied territories."

With its thunderous assault on the Mariana Islands in June 1944, the United States crossed the threshold of total war. In this tour de force of dramatic storytelling, distilled from extensive research in newly discovered primary sources, James D. Hornfischer brings to life the campaign that was the fulcrum of the drive to compel Tokyo to surrender—and that forever changed the art of modern war.