How did the Vietnam draft work before 1969?

The Selective Service System holds a draft lottery to induct 1969 vietnam draft lottery The lottery of 1969 was conceived to address perceived inequities in the draft system as it existed previously and to add more military 1969 vietnam draft lottery The Vietnam draft lotteries functioned as a randomized experiment—which has allowed social scientists to study its life-changing effects

1969 draft lottery The first-ever televised draft lottery, December 1, 1969 which was held for young men born