What battle gave the union control of the mississippi river and was the turning point in the west?

Which of the following best describes us involvement in the korean peninsula today?

The term globalization is best defined as: a. a reduction in the political and military power of imperial countries over their colonies. b. an increasing interaction among citizens and businesses of countries around the world. c. the spread of philosophies based on the right of all nations to political independence. d. the establishment of international laws protecting all people's human and civil rights.

When conducting research for forming a hypothesis, which practice should historians follow?