What era and period occurred during 418 to 355 million years ago?

Why did great britain finally send an ambassador to the united states in 1791? a) great britain forgave the colonies for their rebellion. b) the u.s. threatened special trade restrictions on british ships. c) great britain did not want the u.s. to become allies with france. d) the u.s. would seek a closer alliance with spain if great britain did not send an ambassador.

How did the mexican american war ignite a conflict over slavery between the north and the south?

What was the largest group of white people in the south