Why is the year 1965 significant in terms of the vietnam war?

a. it is the year when the conflict in vietnam ended.
b. it is the year when nixon made efforts to end the war.
c. it is the year when north and south vietnam were reunited.
d. it is the year when america's true commitment to the war began.

D. It is the year when America's true commitment to the war began.

Explanation:

On February, President Johnson ordered the bombing of targets in North Vietnam, after that, he launched a three-year campaign of continuous bombings. That was known as "Operation Rolling Thunder", this is considered the first sustained American assault in North Vietnam. On the successive months, thousands of ground troops were sent to fight.

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