The Captain Flandry Series

Poul Anderson's Captain Flandry series, eight instalments in three volumes, divides into four pairs; in each case, the second instalment referring back to the first. The series starts with pulp space opera short stories sharing the colourful backdrop of interstellar inter-imperial conflict and ends with a substantial novel about the process of imperial decline. Colour is provided literally by green Merseians, blue Betelgeuseans and a golden Chereionite while historical analysis is provided later by a scholarly Ramanujan (human).

Earth has a colony called Vixen which later has a colony called New Vixen. Germany has an extra-solar colony called Germania which later has a colony called Nova Germania or Germany has an extra-solar colony called Nova Germania whose name is later abbreviated to "Germania." I think that the latter is correct. Nova Germania is mentioned in one David Falkayn story where the inhabitants of the planet are called "Germanians," not "Nova Germanians." The only subsequent references are to "Germania." The planet is a scene of conflict during the Polesotechnic League civil war and is important later as the home planet of Hans Molitor who is the Imperial usurper in the culminating Captain Flandry novel. Unfortunately, we do not see anything of Gemania during Molitor's lifetime.