Answer: The American Civil War was the first war of the modern age. The two sides used advances in communications and military technology to revolutionize the ways in which battles were fought. ... The arrival of railroads and telegraphs also changed the nature of battle.
D. The Olmec. They build large stone head sculptures that required a great deal of manual labor to make.
Andrew Carnegie was born on November 25, 1835, in Dunfermline, Scotland. After moving to the United States, he worked a series of railroad jobs. By 1889 he owned Carnegie Steel Corporation, the largest of its kind in the world.
