21. The Tet Offensive was a strategic blow for the U.S because it showed the communists did not lose the will to fight. Therefore the answer is B. The offensive was a surprise attack and was large in numbers.
For 22. Presidents Truman, Eisenhower, Kennedy, Johnson and Nixon oversaw the conflict. Therefore the answer is C. Dwight E. Eisenhower was never a president.
He attacked on Christmas. Puritans in the New World did not celebrate Christmas, but the Hessians (German mercenaries used by the British) certainly did. So the Americans launched a surprise attack on the Germans who were...ahem...celebrating, to put it mildly
