The way I see militarism working as a generic game mechanics is two fold. It can work in any combination of those :
First, give it a drawback. Prussia was dirt poor during the period its armies were triumphant. It was kept alive by English subsidies. Maybe relying so much on your military should harm your economy in ways that are above having less economic bonuses.
Second, give it harsh prerequisites. From what I gather, Prussia became heavily militarized in reaction to the disaster that was the 30 years war for them. Others have also mentioned how the Junkers were a sort of military aristocracy. They were landed, so they would fit in the nobility, but others have assimilated them with the burghers because they weren't old owners.
Excluding the issue about the potential strenght of the nobility, I can see two other factors here : 1. having strong monarchs with a certain military skill, 2. having had a big part of your country thorougly devastated. In reaction, people would become hypervigilant.
This can happen with Brandenburg/Prussia, but also with Saxony, Brunswick, or any small country in the crossfire of a big war. It doesn't necessarily have to be the 30 years war. Imagine Poland miraculously surviving the partitions. Maybe they could "earn" that ethos, then.
First, give it a drawback. Prussia was dirt poor during the period its armies were triumphant. It was kept alive by English subsidies. Maybe relying so much on your military should harm your economy in ways that are above having less economic bonuses.
Second, give it harsh prerequisites. From what I gather, Prussia became heavily militarized in reaction to the disaster that was the 30 years war for them. Others have also mentioned how the Junkers were a sort of military aristocracy. They were landed, so they would fit in the nobility, but others have assimilated them with the burghers because they weren't old owners.
Excluding the issue about the potential strenght of the nobility, I can see two other factors here : 1. having strong monarchs with a certain military skill, 2. having had a big part of your country thorougly devastated. In reaction, people would become hypervigilant.
This can happen with Brandenburg/Prussia, but also with Saxony, Brunswick, or any small country in the crossfire of a big war. It doesn't necessarily have to be the 30 years war. Imagine Poland miraculously surviving the partitions. Maybe they could "earn" that ethos, then.
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