How did the railroads farmers on the great plains in the late 1800s?

Why hadn’t europeans used maritime routes before the age of exploration?

Look at the map of cities in the united states at the turn of the twentish century what impact did railroads have on cities across the united states at the turn of the twentish century

The slave dred scott sued for his freedom because he was born a free man. he had lived in a free state. slavery violated the 13th amendment he had been freed by pres. lincoln.