For those that ‘remember’ the Vietnam era, in the midst of the student college takeovers and burning draft cards, to make up the slack Macnamra’s 100,000 was born.
At that time the draft policy was changed so that MOST everyone was ‘eligible’ and those that had been ‘denied’ enlistment or exempt for the draft because of mental/educational/societal ‘problems’ - believe they were called Category IVs - were suddenly eligible.
That plus ‘forcing’ the USMC to take draftees ended in the Corps being ‘stuck’ with a lot of malcontents being run through Parris Island and/or San Diego MCRD’s...
The discipline problem was so bad that the Corps had to instigate a ‘15% attrition rule’ - once 15% of the recruit class had washed out for disciplinary rules, NO MORE could be punished for it.
The real street smart dudes - some that thought going to Nam would make them instant drug lords - would sit back wait for the 15% to exit, then slide through the rest of boot camp.
My sister was in the Air Force’s OSI during Project 100,000. They ran thousands of cases for every crime imaginable. My sister suspects that they eventually got rid of all 100,000 at a huge cost. She says it was an unmitigated disaster.