rushing as a 21 yr old fesh/soph?

[armyinfantry]

At the moment I'm in the US Army serving in Afghanistan. I'll be home soon and will be attending URI the following Spring of my return, at which point I'll be 21. I don't know yet whether I'll be a freshman or sophmore (depending on how many of my online course credits will transfer) but I want to rush when I get there, get back some of the similar brotherhood I have here. My question is will I be looked at as too old to rush, will it come off as weird? I don't know much on Greek life or how certain things as such would be percieved. Thanks for any help guys, much appreciated.