Was the Vietnam War justifiable and fought in an honorable manner

Question 1: Was the Vietnam War justifiable and fought in an honorable manner? What was the intent behind the American involvement (from Eisenhower through Johnson)? What were the public arguments for and against the war? Did the United States achieve its goals set in the “peace with honor’ policy of the Nixon Administration? Question 2: Given the American promise, did the United States fulfill this promise from the ratification of the Reconstruction Amendments to the present day? If yes, how? If not, why? Hint for #2…you must first define “American promise” before you give your educated opinion about its fulfillment. (Some might say it was embodied in Jefferson’s phrase “life, liberty, and the pursuit of happiness” while others might say it is the guarantee of equal rights and opportunities for all of its citizens.)