Explanation:
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This is true.
They were nomadic societies and when food and water would become scarce, many would split and go different ways based on where they believed they should go to find more.
The answer is true. i’m 50% sure
In the Mexican-American war, the Mexican's were not prepared for the battle: they did not have a strong enough army to handle America and they were already falling apart.
Source was History.com if you need more