Which US presidents supported backing the South Vietnamese?

There were 5 Presidents involved with the Vietnam conflict

Explanation:

Truman, Eisenhower, Kennedy, Johnson, and Nixon

Mainly President Dwight D. Eisenhower notably pledged his/ US support in 1954

while it was true that the cotton gin reduced the labor of removing seeds, it did not reduce the need for slaves to grow and pick the cotton.

explanation:

before eli whitney's invention of the cotton gin, picking and cleaning cotton was a slow, labor-intensive job. workers, usually slaves, had to pick the seeds from the cotton fibers by hand. this invention made it possible to grow large amounts of cotton on big farms and make money.