Why did native american economic systems weaken in the late nineteenth century?

Many nineteenth-century Indians faced an erosion of their economies in the face of American expansion. Removal from their lands or a corrosive reliance on the Anglo-dominated market (or both) was a common outcome. The natives of the Eastern seaboard had faced these problems in the colonial period.

hello!

according to the passage the most suitable options are two. the first one is "by leading the aef to victory in several key battles" like the battle of saint- mihiel and the battle of cantigny mentioned in the passage you copied here. the second one is "by the aef and allied forces defeat germany" since the passage says that his army destroy the german resistance in the meuse- argonne offensive. and also, "by insisting that the aef operate as an independent force".

hope this