Most of the novel details various political machinations of the new "United States" and the attempts of Cardinal Richelieu to nullify the threat posed by the technological advantage the up-timers have given to Gustavus Adolphus and his "Confederated Principalities of Europe". Richelieu completely changes France's foreign policy and forms an alliance aimed squarely at the NUS and Gustavus called the League of Ostend. Mike Stearns sends emissaries looking for allies, some of whom end up behind enemy lines as they already belong to the secret League of Ostend, which announces its presence in the Battle of Four Fleets. The Dutch Republic nearly falls and Stearns' emissary voluntarily stays behind, becoming trapped in the Siege of Amsterdam.