Your information is helpful.6013 ASU STA COMP HQ DET means: Your Dad was assigned to the 6013 Army Service Unit, (STA COMP) is a composit group, not sure what, and HQ DET means Headquarters Detachment.Your DD-214 lists this as his duty station.He was discharged while assigned here.Look at box 26 on the DD-214 and you will find the duration of his overseas service.
The patch you describe would be red in color and shaped like a leaf.It has a bolt of lightning running from top to bottom.It is the 25th Division Patch.
The Occupation Medal would be hangning from a ribbon that would have verticle stripes of white, blue, red and white again.The bars you refer to, could they possibly be ribbons.Each medal issued is also issued w/a ribbon.The ribbon is worn on the uniform and the medal is usually displayed in a case.They are sometimes worn.The stars usually indicate battles.Are the three on a blue and white ribbon?That would be the Korean Service Medal.
All enlisted men enter the service with a rank of E-1.The stripe you describe would indicate he was promoted to Private 1st class (One stripe).
You can go to www.usmedals.com and request a catalog.You can also purchase replacement medals from them.I have done so and am well satisfied.
Your Dad is entitled to one more medal, the Republic of Korea, War Service Medal.This was authorized in Oct of 1999. It must be applied for and all you need is a copy of his DD-214.Also include a copy of his DD-215.I will look up the address and post it for you.