3. INTERPRETING A Study the unit time line on pages 248–249. Which events on the Chapter 12
segment were the result of U.S. imperialism? of European imperialism? of
Japanese imperialism?

One innovation in making the rail road industry grow was the development of steel through the Bessemer process that made steel stronger and more inexpensive. Another innovation that was much before the industrial revolution was the ball Bering which made it less demanding to make a wheel turn.