Final answer:
Military uniform standards typically require a male soldier to thread the belt so the brass tip passes on the left side of the buckle. The provided historical context does not specify modern military dress standards, but general practice dictates left to right threading for a uniform appearance.
Step-by-step explanation:
The question pertains to the correct way a male soldier is to thread the belt through brass-tip belts as part of a military uniform. While the provided information is rich in historical context, mentioning soldiers with round shields, spears, helmets, and other gear, it doesn't directly dictate the standard uniform regulations for modern military forces.
However, for modern military uniforms, it is typically required that belts be worn through the belt loops so that the tip passes through the left side of the buckle, finishing left to right, which is universally accepted in many military institutions. The brass tip should then be visible on the left side for a professional and uniform appearance. Each branch may have specific guidelines, which would be found in their uniform regulations manuals.