What period was carnegie describing

What does the term “escalation” refer to?

Plz ! after the first battle of bull run general ivan mc dowell was removed from command of the union army he was replaced by a. general ulysses s. grant. b. general george mcclellan. c. general robert e lee. d. general george meade.

How did the discovery of gold impact american indian territory in the 1870s? a. war broke out among american indian groups when warring chiefs signed new treaties with the government. b. war broke out when white settlers pressured the government to take the land from american indians. c. war broke out when white settlers pressured the government to let american indians keep their land. d. war broke out when white settlers tried to buy land from warring american indian groups.