How many american soldiers who served on the vietnam war were drafted?

25% (648,500) were draftees.

It is generally estimated that about 25 per cent of the military force in the combat were draftees in Vietnam war. The war lasted between 1964 and 1973. The U. S. military drafted about 2.2 million eligible men. Most of the men serving in the war were younger, pass out from colleges.