This is an unabashed Pulp-style adventure set in northern Mexico, with plenty of adventure and action, evil cults and wielders of magic to keep everyone on their toes. Basically, the Investigators are asked to accompany an ageing General Pershing to Mexico to finish what the Mexico Punative Expedition of 1916 began, dealing with rebels... but of course there's a bit more to it than that.
Pre-generated characters, with backstories that weave them into the plot, are provided and their use is recommended unless you want to run this as part of a larger campaign with existing Investigators. If you are doing that, some hooks to help you get them involved with the trip are provided. There's plenty of background on Mexico and the people involved available for Investigators to discover through the usual channels before they go - and a big section of Secret Background for the Keeper's eyes only: the lowdown on what is really going on... and what Pershing is really up to.
The adventure itself starts with the party leaving Cuidad Chihuahua for the Valle de Bustillos where all the action takes place. Plenty of material is provided about places to visit and people to interact with, this should help bring the adventure to life and fuel the action. There's all sorts of folk here from natives and even a bunch of Mennonites to rebels and members of a fire-worshipping cult. Following the clues should eventually lead the party to witness the climax of the adventure: a scene straight out of Indiana Jones with cultists enacting a ritual to summon their deity... will they manage to stop them?
Following this is a magnificent array of resources and information for the Keeper, with plenty more NPCs, weird drugs to sample and more. Finally, there are character sheets for the pre-generated Investigators. Each has their own background showing their involvement not just with the adventure at hand, not even just with Pershing, but with each other as well. This needs to be handled carefully as it has the potential to set them against one another - not all groups of players like that, but you know your players better than the authors! Amend as necessary. There are also some beautiful handouts (even if the list thereof refers to 'Page XX' several times - look it's about the only proofing error here apart from confusion between 'discrete' and 'discreet' in one of the character sheets!): maps, documents, newspaper clippings and the like.
It's a well-presented alternate history adventure with plenty of pulp action, neatly weaving Mythos fiction through known historical fact to provide something that proves extremely entertaining to run.
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