The age of Jack Jackson and Westward expansion unit test what did Alex t trucks to Bill observe on his visit to the United States that reflected changes that were happening in the country during Jackson's administration
It seems like there is some confusion in your question. It is not clear what "Alex t trucks" and "Bill" refer to. Additionally, it is not specified what observations they made during their visit to the United States. Please provide more information or clarify your question for a more accurate answer.
