Which caused problems for the us military as it attempted to carry out the war in Vietnam

The distance to Vietnam made it difficult to supply forces in the field is the correct answer.

Explanation:

Vietnam War (also known as The Second Indochina War or as The Resistance War Against America) was a conflict that took place between 1955 and 1975 in Vietnam, Cambodia, and Laos. Since it took place for so many years and it was too far from the United States, carrying the supplies for the forces caused problems for America.

Soldiers' morale was low and there was a lack of discipline