 For example, defense recruiting reports show 34% of the recruits in 1964 up to 50% in 1970 indicated they joined to avoid placement uncertainty via the draft.These rates dwindled to 24% in 1972 and 15% in 1973 after the change to a lottery system.Accounting for other factors, it can be argued up to 60 percent of those who served throughout the Vietnam War did so directly or indirectly because of the draft.