They got their slaves from within their own tribes I believe
The Native Americans
Hope this helps
Answer:
The confession cannot be used, because Alvarado believed that he could not leave. The confession can be used, because Alvarado was not in custody. The confession can be used, because Alvarado thought that he could leave.
<u><em>The US was trying to get to peace but they were forced to fight back.</em></u>