Terry Pratchett - Monstrous Regiment

The bulk of Monstrous Regiment takes place in the small, bellicose country of Borogravia, a highly conservative country, whose people live according to the increasingly psychotic decrees of its favored deity, Nuggan. The main feature of his religion is the Abominations; a long, often-updated list of banned things. To put this in perspective, these things include garlic, cats, the smell of beets, people with ginger hair, shirts with six buttons, anyone shorter than three feet (including children and babies), sneezing, rocks, ears, jigsaw puzzles, chocolate, and the colour blue.

The list of "Abominations Unto Nuggan" often cause conflicts with Borogravia's neighbours, and the uncertain whereabouts of Nuggan leads the inhabitants of Borogravia to deify their Duchess, to whom they pray instead. This is slowly causing problems, as on the Discworld, belief grants power. Borogravia is in the midst of a war against an alliance of neighbouring countries, caused by a border dispute with the country of Zlobenia. Rumor is that the war is going poorly for Borogravia, though the country's leadership (and "everyone") denies it.