This supplement equips you to take your Achtung! Cthulhu adventures across the world to the Pacific Theatre, where ferocious battles in the Pacific islands and Southern Asia and the perils of jungle warfare are mixed with the emergence of ancient evils. Chapter 1: Welcome to the Pacific sets the ball rolling by setting the scene with a time-line of events pertinent to the Far East from 1854 right through to the events of the Second World War. Mostly historical, it is enlivened by snippets of information - often presented in the form of 'notes' apparently pinned to the page - that add colour and suggest ideas as wekk as adding further material about people and events of the times. It ends in April 1945, with a note that if you run the forthcoming Achtung! Cthulhu: Assault on the Mountains of Madness campaign, events in Europe from 1944 on are likely to be world-changing enough to disrupt matters here in the Pacific.
Chapter 2: The Land of the Rising Sun gives an introduction to Japan, a mysterious land that until the 1830s had deliberately isolated itself from the rest of the world. Since the succession of a new emperor, rapid changes turned the nation from feudalism and mediaeval standards of living to a modern technological country ready to take its place on the world stage. This is coupled with an aggressive military stance directed against China and Russia... and the development of many secret societies whose tentacles reach out through every part of Japanese society. This sets the background against which Japan enters the Second World War by attacking Pearl Harbour in December 1941, dragging the United States into the conflict.
Next, Chapter 3: The Balance of Power looks at the state of affairs in the Pacific region during the run up to World War Two, as well as giving a brief overview of how events unfold as time progresses. It's to be noted that few people had much idea of the situation there unless they have some connection with the area, this applies to Investigator characters as much as anyone else. Apart from China, Thailand and Japan, much of the region is under colonial control from elsewhere - and even a fair bit of China's territory is under Japanese control.
This is followed by Chapter 4: In Captivity, which expands on earlier references to the cruelty of the Japanese to those they invade as well as to prisoners of war. Although game mechanics are provided, it is probably best that characters do not find themselves in captivity.
Next comes Chapter 5: New Beginnings. This provides rules for generating characters who come from the Pacific region as well as providing appropriate new career paths and other material, with mechanics for both Call of Cthulhu and Savage Worlds. There are also additional military careers and training packages relevant to this theatre of war. Characters sorted, Chapter 6: The Whole Kit and Caboodle provides all the weapons and equipment that they could dream of, with Japanese weaponry included as well.
Chapter 7: The Best Laid Plans discusses the challenges of conducting combat operations in the Pacific region. This includes notes on Japanese combat doctrine and methods as well as the perils of jungle warfare... and as if that wasn't enough, Chapter 8: Exotic Beasts and Vile Beings provides plenty of wildlife and more hostile adversaries with plenty of detail of Chtulhu Mythos presence in the area. Piling more on, Chapter 9: Artefacts, Spells and Tomes delivers information on notable items and books that might be encoungtered and a few new spells to cast.
Then Chapter 10: The Many Faces of War provides a raft of NPCs from famous people to generic soldiers and civilians that the characters might encounter in the course of their adventures. Chapter 11: Adventure Seeds provides several ideas for plots to be run in the Pacific region, although they are just brief outlines and will require work before they can be played through. Finally, Chapter 12: Suggested Resources provides reference to books, films and other materials that can set the scene, provide further information or just get you into the right mood for a Pacific campaign.
Overall, this is a comprehensive introduction to a lesser-known aspect of the Second World War with sufficient Mythos involvement to keep any investigator intrigued.