Okay, everyone knows Corporal Agarn's hometown is Passaic. Mentioned several times.

You're a real fan if you know Sergeant Morgan O'Rourke's hometown. For that matter, you're also a real fan if you know his
middle name.

To the best of my knowledge, each was mentioned only once during the series' run.

Who wins the cigar? :-)

I believe his hometown was Stuebenville, OHIO

You are very correct! And it was only mentioned in two episodes, so good job!

BTW his middle name, mentioned only once ("The Phantom Major") was Sylvester.