Napoleon was able to conquer much of Europe because of its proximity to France and because most of those places did not have any geographically threatening areas. The geography of Russia however led to his downfall because the climate did not allow for his success, he and his men almost froze to death before conquering Russia.
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I am confused about your question, because neither Truman or Eisenhower were around when Vietnam was happening...
If you clarify, I might be able to answer your question
Andrew Jackson had 2 wifes and 10 children. Although 8 out of the 10 children were relatives such as nieces that had been taken care of by Andrew because of parental deaths. He adopted 2 sons, Andrew Jackson Jr. and Lyncoya. They served as guardians for the 8 nieces named: John Samuel Donelson, Daniel Smith Donelson, Andrew Jackson Donelson, <span>Andrew Jackson Hutchings, </span>Caroline Butler, Eliza Butler, Edward Butler, and Anthony Butler.