This collection of adventures considers the Great War, 1914-18, from the perspective of Trail of Cthulhu. From the conflict in the air, to the depths of the sea, the home front and the different battle fronts, the Great War affects the lives of countless millions of people. It also brings humanity into conflict with elements of the Mythos, and in particular the Charnel God Mordiggian who, for the first time in centuries, may actually have more to devour than it can stomach.The forces of the Gods do not take kindly to being disturbed, and nor do they usually play favourites; unless your players are careful, they may find themselves attacked and wiped out in an instant, caught in an otherworldly crossfire they can only hope to survive, not understand.Campaign FrameDulce et Decorum Est features GUMSHOE adaptations and new abilities for war in the air, and on the sea and land, and how the mythos might interact with the horrors of the war, and the participants.Dulce et Decorum Est "“ Great War Trail of Cthulhu contains the following scenarios:VaterlandThe once-mighty Vaterland is a prisoner of politics. She is trapped in New York Harbour, as war rages in Europe. Her crew and Commodore are just as much prisoners as the ship herself, though they are making the best of their captivity by hosting concerts in support of the German relief effort. You've come aboard at the behest of John Rathom, editor of the Providence Journal, in hopes of uncovering a German plot.Dead Horse CornerThe protagonists discover that a trench which ought to have been occupied by their fellow soldiers has been abandoned. Twenty men vanished without a trace, food still on the table and coffee cooling in their mugs. Was it an enemy attack, or something less ordinary?Sisters of SorrowThe crew of German U-boat UC-12, is sent on a standard mission; penetrate the North Sea defensive zone, make their way to Tyneside, lay their mines and return. But nothing in the Great War is that simple. While underwater, the crew start to hear a strange, muffled booming noise, ringing like a sequence of church bells. It's not whales. It's not enemy forces. Something else is down here. While settled on the sea floor to get some much-needed rest, the crew starts to act suspiciously. Someone is up to no good. The ship's cat disappears and a strange weed is found growing on board.Then the tapping on the hull begins!