The first mail order catalog was significant because it paved the way for other corporations starting mail order catalogs. It gave consumers a new way to purchase things and a broader selection that probably weren't seen in the stores.
In reality, that first mail order catalog has etched its way into our modern day society in the way of online ordering systems, as well.
That statement is true
America is not always been 50 states as it is today. We started from the east coast and slowly expanded our territory until it reached the pacific
After 1812 we managed to expanded our territory and acquired Ohio and Upper Mississippi