He is best known for his work
Answer:
Explanation:
Historians have long argued over whether East German leader Walter Ulbricht or his Soviet counterpart Nikita Khrushchev was ultimately responsible for the construction of the Berlin Wall. A newly discovered Russian document from August 1961 provides some answers.
It was primarily the "b. formation of the Vietcong in Vietnam" that led the Truman administration to expand the containment doctrine to include Asia, since this was seen as a threat to democratic principles in the west as well.
