The Lost Regiment is a series of science fiction novels written by William R. Forstchen. Plot The plot revolves around a Union Army regiment and an artillery battery from the American Civil War which get transported to an alien world. The 35th Maine Infantry regiment and the 44th New York Light Artillery battery travel to a different world using a ship that emerged from a mysterious electrical storm. The alien world is populated by descendants of medieval Russians (or "Rus") who still live a feudal existence at a medieval level of technology. They learn from their new hosts that there are various civilizations on this world made up of the descendants of people from various eras of Earth's history. The Union soldiers eventually discover a terrible secret their Russian hosts have been keeping from them when the Tugar arrive. The Tugars are ten-foot-tall aliens with a culture and technology similar to that of the Mongol Horde. They ride a never-ending circuit around the planet. They have subjugated the human populations in their territory and used them as food. The Tugars visit each human society once a generation and cull part of the population for food. This culling keeps the humans docile and compliant and the Tugars make sure that none of the human societies become advanced enough to challenge them. The Union men are horrified by this revelation and kill the Tugar advance scouts. In the aftermath, they support a peasant rebellion against the Tugar-appointed lords and begin modernizing Russian society. When the Tugars arrive, they encounter a semi-modern army equipped with cannons and smoothbore muskets. In a hard-fought battle, the humans manage to prevail, weakening the Tugar Horde forever. The next several books take up the story a few years later. The Russians have begun to explore the possibilities of a union with the Romans who live in the territory next to theirs and who were spared from the Tugar depredation by the Russian victory. Meanwhile, they face a renewed threat from the Merki Horde, members of the same alien race as the Tugars. The Merki make the same circumnavigation of the globe as the Tugars do but in a zone further south. Once the Merki learn of the Tugar horde's weakening, they seek to take advantage of the Russians. Realizing the disastrous effects that would come from an industrialized enemy, they seek to maintain their racial dominance over