RE4 is a reentry code given when a service member is dicharged. Some branches get a little more specific (they'll have something like RE4A, for example to specify an exact reason), but an RE4 in all branches means they're not recommended for reentry into the military. This could be due to a Bad Conduct/Other Than Honourable discharge (which is usually the case), but it can possibly be for reasons which aren't as malicious, as well.
It's possible to get waivered in.... if your RE-4 was from a branch other than the Army. If you have an RE4 from any Army component, your odds of it happening are significantly less. It doesn't seem to make much sense, but bear in mind that we're talking about the Army, and not much about it ever does.
Situation dependent. Really depends on the RE code, and what branch you were discharged from. An RE2 or RE3 could go into the Guard with a waiver.... generally, an RE4 cannot, but it MAY be possible in some instances, IF you were discharged from a branch other than the Army (the Guard can be weird like that).
aye there is
no
The DD256 is your honorable discharge certificate, which you can display in a similar manner to a diploma or degree. The RE4 reentry code means that you're not recommended for reenlistment - some branches get more specific, and add a letter to the end of the reentry code to give a more specific reason for the characterization of service - some do not. The RE4 will more than likely prevent you from being able to reenlist.
Capcom
Yes
This is not certain.
Killer7
modif
nothing will happen if you shoot all the paintings in re4 nothing will happen if you shoot all the paintings in re4
No