Final answer:
The historical advantage of nomadic warriors like the Mongols lay in their mobility, horsemanship, and adaptability in combat, while indigenous peoples often lacked immunity to European diseases such as smallpox. The introduction of firearms eventually led to the decline of nomadic warfare and the adaptation or sedentarization of nomadic groups.
Step-by-step explanation:
The question appears to be rooted in historical inquiry, specifically the advantages of nomadic warriors and the impact of disease on indigenous populations. Throughout history, nomadic societies such as the Mongols, the nomadic plains Indians, and the Assyrians, had several advantages due to their mobility and military tactics. The Mongols, for instance, were formidable horsemen, able to switch between several horses, and were adept at constructing siege weapons from materials found on-site. They also had highly strung bows, requiring two men to string, and could fight in all seasons, including winter.
On the other hand, indigenous populations such as Native Americans faced significant disadvantages when encountering Europeans, notably lacking immunity to diseases like the flu and smallpox. As European diseases were foreign to the Native American populations, they had catastrophic impacts. Over time, the introduction of firearms and the resulting military technology shift contributed to the decline of the nomadic way of life and mounted warriors; though some, like the Plains Indians, adopted these new weapons into their culture.