Why did imperialism grow in europe at the end of the 1800's

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

Then write 1-2 paragraphs describing one individual you believe has made a significant contribution to florida and united states history. in your response, explain why this individual's contribution was significant.

During the cold war, the united states was involved in certain regional conflicts due to fears later called the domino theory, which stated which concept?