Why is the louisiana purchase treaty an important document in the study of manifest destiny?

Not only is it the purchase of about 40% of America, it also helped grounds to on-go our advancement as a civilization.

This is what i found on google “the first mobile phone call was made 40 years ago today. on april 3, 1973, motorola employee martin cooper stood in midtown manhattan and placed a call to the headquarters of bell labs in new jersey.” i hope this you for what your looking.