What new technology did the Union Navy use at the battle of Port Royal?

Did the both the us and ussr have atomic weapons after 1949

What is the columbian exchange? o a. the changes that resulted from europeans settling in the new world b. the relationships that columbus and his men had with the natives they met o c. the ships that columbus bought with money from the king and queen of spain o d. the increase in the number of native american towns in the new world

What was the name of the radio talks roosevelt would give to the public called