Sparta was probably the most brutally militaristic society the world has ever seen. The entirety of their society was focused towards physical and military perfection. Sparta enjoyed great prosperity at times with the free population free to pursue militaristic supremacy. They were also one of the least sexually repressed societies of the ancient world. Women were not only able to enjoy many of the same freedoms as men, but were often the most wealthy individuals in Sparta (much to the chagrin of their Athen neighbors). But, those ladies were brutal. They were often the most vehemently supportive of the warrior lifestyle in Sparta and were also generally very physically fit and well educated.
All of these "enlightenments" were overshadowed, however, by the system that allowed them to focus completely on military might. That system was the enslavement of the Helots, which the Spartans believed were the natives to the land while the Spartans emigrated there and enslaved the Helots. So, the Spartans constant fear was a slave uprising. This they deterred by indiscriminate brutality. Torture, rape, random killings, etc. were the norm for the Helot population enslaved by the Spartans. But, the Helots provided enough slave labor to completely free the Spartans to pursue professional soldiery. This atrocious system is just one of the many employed by the Spartans. It doesn't even touch on the systematic infanticide that would "weed out" the perfect babies from the imperfect ones.
So, enough with the backstory. What I want to know is; if there were a nation today that carried many of the same ideals as the Spartans did, what would it look like? Would it be militarily supreme as it was in the past, or would it be overshadowed by the modern need for supplies? Could a slave force be large enough to properly supply and feed a modern (strongest in the world) military today without coups and uprisings making it infeasible?