A cause was that Texas declared its independence from Mexico. It changed the U.S. by the U.S. gaining California, New Mexico, Utah, Arizona, Colorado and parts of Wyoming.
I would go for:
<span>North had a more widespread network of railroads available for delivering troops and supplies to the battlefield.</span>
It showed us the harmful effects of racism through the treatment of Jewish people in concentration camps in Germany.
<span>The Americas were the last (well, second-to-last if you count Antarctica) continents to be inhabited by early humans. Archaeologists estimate that people entered North America by crossing over the Bering Strait, which back then was a wide swath of land, about 15,000 years ago.</span>
Events that led to the Boston Massacre. Since 1765 the people of Boston had been heading protests against British taxation, first against the Stamp Act and then in 1767 against the Townshend Acts. ... Riots and protests were common occurrences as well as attacks on tax officials. and thats all i know