1635: The Eastern Front — Eric Flint

The Thirty Years War continues to ravage 17th century Europe, but a new force is gathering power and influence: the United States of Europe, a new nation led by Gustavus Adolphus, King of Sweden, and the West Virginians from the 20th century led by Mike Stearns who were hurled centuries into the past by a mysterious cosmic accident. While the old entrenched rulers and manipulators continue to plot against this new upstart nation, everyday life goes on in Grantville, even under the shadow of war, as this lost outpost of American freedom and justice must play David against a 17th century Goliath of oppressive feudalism.