The Europeans, and then the Americans, had three advantages. First, so long as they could gain a foothold on the continent, they had the ability to bring overwhelming numbers to bear over time. Second, the technology they had was superior in general to what the Indians had. Finally, and most important, the Indians were deeply divided against each other, and allying with a European force meant they could subdue their enemies. A further advantage more devastating than weapons were the diseases the Europeans brought with them and against which the Indians had no defense.
