How did Vietnam the draft change in 1969 and why was this change enacted?

In 1969, the Vietnam draft changed with the introduction of a lottery system, replacing the previous method of selecting draftees based on age and order of birthdates. This change was enacted to create a fairer and more random selection process amid growing public discontent and protests against the draft, which many viewed as disproportionately affecting lower-income individuals and minorities. The lottery aimed to alleviate some of the inequities associated with the draft while also addressing the increasing unrest and opposition to the Vietnam War.