At the beginning of the seventeenth century, epidemics of bubonic plague and typhus fever were frequent occurrences in various parts of Central Europe, but they were usually kept localized by the strict measures that were adopted, in accordance with the best scientific knowledge of the time, to prevent them from spreading; the houses in which the patients lay were quarantined, strangers from infected places were forbidden to enter the cities under penalty of death, the clothes and beds used by the patients were burned, while in the streets and public squares fumigations took place. But in the storm and stress of the Thirty Years’ War such precautions could be taken only to a limited extent, and even when they were energetically carried out, they did no good, since diseases were so frequently borne from place to place. A further consequence of the long war was famine, which was caused by the devastation of the fields and the non-cultivation of the land, due to the lack of workers. This made it easier for pestilences to become unusually widespread throughout Germany. The fact that the scene of the war kept changing was also to a great extent responsible for the gradual dissemination of various diseases, since the regions in which the fighting was going on were always particularly exposed to pestilential devastation. Unfortunately we possess, for the various pestilences, scarcely any accounts written by physicians, and with a few exceptions must rely upon the information given by chroniclers. In most cases, therefore, it is impossible to state with certainty just what the individual diseases were. Consequently, inasmuch as the word ‘plague’ is used in the chronicles for any serious pestilence, we have adopted it in this same general sense in our account, without necessarily meaning thereby bubonic plague. Certainly one of the most common ‘war diseases’ at that time was typhus fever, and diseases that were commonly called ‘burning, virulent fever’, ‘plague’, ‘head-disease’, ‘Hungarian disease’, and ‘Swedish disease’, were undoubtedly nothing else but that. At the same time real plague, bubonic plague, now and then occurred, and the word ‘plague’ is thus very often used in its proper sense, especially in reference to the pestilences of the years 1630–6. ‘In the history of this calamitous war,’ says Seitz,[26] ‘we see typhus fever like a malignant spectre hovering over the armies wherever they go, in their camps, on their marches, and in their permanent quarters, and preparing an inglorious end for thousands of valiant warriors. Its ravages among the non-belligerent population in town and country caused the inhabitants of many provinces to remember with hatred and loathing the departed soldiers, who were usually accused of having planted the seed of death.’