The Thirty Years War was devasting to Germany whose civilians died in even greater numbers than in WWII. Armies were still mostly composed of mercenaries (fighting for Sweden this fellow may well have been one) who were mainly expected to support themselves on the march. Hence, they plundered the surrounding villages and countryside, killing anyone who got in their way. It's estimated 15-30% of the German population was lost; one region lost over 60%. About half the men died. Some areas didn't recover their population until modern times. One result of the devastion and travelling armies were outbreaks of pestilence and disese, which laid this fellow low. Serving with the Swedes, he would not have been mourned by the people of Southern Germany. The term Schwedentrunk means Swedish drink. The soldiers, or their followers in the trains, would force a funnel into the victims mouth and pour in foul water, usually contaminated with manure, to force them to give up hidden valuables and food.
Germany certainly is a blood-soaked land.
No wonder Germans comprised the highest number of immigrants to North America.