In my senior year at Duke I drew No. 70. So I chose to join the NC National Guard (6 year enlistment).  I was told to be ready to go to basic training in January, 1970. 

Duke would not refund tuition for this voluntary obligation that took me out of school, so I withdrew for the Spring Semester, which subsequently became a pass/fail semester because of the "riots".  Then I did not get called up til mid-June 1970, so I could have stayed in school and graduated.  Came back for fall semester, 2 weeks late however, did not pass 2 courses and "flunked out".  Subsequently came back to school after a 3 year sabbatical and got my degree.