Can you rejoin the army after discharge?

This is not a very easy question to answer, as it has many variables. That being said, as long as your disharge was under favorable conditions and you haven't gone and become a felon since your discharge and you still meet the requirements for enlistment, you can generally reenlist prior to disharge. Generally speaking, unless you left with a BCD or a dishonorable discharge, or some sort of medical or mental discharge disqualifying you from service and you haven't become an outlaw you should be in the clear.