12. Which position did Franklin Pierce begin holding in 1853? A. editor of The Liberator
B. chief justice
C. president of the United States
D. United States senator

the answer is the letter b governor of new mexico territory

the indians crossed artificial boundaries, setting the stage for conflict

lee and grant, both of whom held the highest rank in their respective armies, had known each other slightly during the mexican-american war (1846-48) and began their dialogue by exchanging awkward personal inquiries. characteristically, grant had arrived in his mud-splattered field uniform while lee had turned out in full dress attire, complete with sash and sword.

explanation:

explanation:

the addition to geographic boundaries that might have  kept the people of the huang river civilization from traveling to far distance region is that they had learned about the other river valley civilizations but feared contact would bring invasion.

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