The Thirty Years' War is presented as the culminating disaster of a weak German confederacy, in which the emperor and half the empire fought Sweden and the other half. Its significance in the argument is institutional as well as military: the war devastated Germany, and its settlement was negotiated and dictated by foreign powers, whose treaty provisions became part of the Germanic constitution. The episode makes visible the costs of a union that could not secure concerted action among its sovereign members or protect itself from external influence.

Germany's divided constitutional order

The account situates the war within a system whose formal powers concealed fundamental weakness. The empire was organized as a community of sovereigns; its diet represented sovereigns, and its laws addressed sovereigns rather than citizens. Despite the emperor’s numerous prerogatives and the diet’s constitutional standing, this arrangement left the empire, in the text’s diagnosis, unable to regulate its members, insecure against external danger, and continually unsettled by internal conflict.

That structural weakness appeared in recurring wars between the emperor and the princes and states, as well as among the members themselves. Requisitions for men and money were disregarded or only partly met; attempts to enforce them failed or brought destruction that swept in the innocent as well as the guilty. The Thirty Years' War is therefore not introduced as an isolated calamity, but as the most devastating instance in a wider record of disorder and ineffective common authority.

The course and settlement of the war

Before the peace of Westphalia, Germany endured a war lasting thirty years. The emperor, joined by one half of the empire, stood on one side; Sweden, joined by the other half, stood on the opposite side. The account stresses the division within the imperial body: the confederacy’s members did not form a single effective force, but were arrayed across opposing camps in a conflict that devastated the country.

The war’s ending did not demonstrate the recovery of the empire’s own capacity to settle its affairs. Peace was negotiated and dictated by foreign powers, and the articles of the settlement, to which those powers were parties, became a fundamental part of the Germanic constitution. Thus the conclusion of hostilities also registered a loss of constitutional independence: outsiders helped determine terms that entered the empire’s governing framework.

Political significance in the argument

The example supports a broader warning about confederacies that leave their members politically sovereign while relying on common institutions to manage shared dangers. The German experience shows how internal rivalry and weak enforcement can coexist with extensive formal powers, leaving a union vulnerable both to conflict among its own members and to external intervention. In the surrounding argument, the war’s destructive outcome is evidence that constitutional authority on paper cannot substitute for the practical capacity to coordinate and govern.

The Federalist places this European precedent alongside other examples of divided unions and contrasts such failures with the proposed Constitution’s mixed structure. That proposed government is described as federal in its foundation and in the extent of its powers, partly federal and partly national in the sources of its ordinary authority, and national in the operation of its powers on individuals. The contrast gives the Thirty Years' War a specific argumentative role: it warns against treating a union of sovereign political bodies as sufficient protection against internal division, while the proposed arrangement is presented as combining federal and national features rather than reproducing the German model.