He said they were surrounded for a year. Mostar is the only place that comes to mind. There are not many places with 80K people in Bosnia (half a dozen), and especially in Herzegovina (only 1, the rest are small towns). My initial guess was Bihach (there were more than 100K in that town though), but they were surrounded for much longer than that. I lived half my life in Mostar. During the war between Croats and Muslims, numerous Muslims surrendered to us (Serbs) just because they couldn't take it any more. We ceased fighting during that period, enjoyed a year of relative peace and saved Muslims on numerous occasions by "donating" artillery rounds. The easiest way to transport those was to fire them at advancing Croatian army. We never tried to take the city, and Muslims nearly abandoned their lines towards our army since they needed all able bodied men to fight the advancing Croats. I don't know how much did Muslims in Mostar know about this, but we had a plan of evacuation for some 80K Mostar Muslims in case their lines broke and they had to flee. At the same time, towards the north side of our's brigade's territory, we provided help to a Croatian village that was attacked by Muslims. That war was one stupid mess. So many people died for nothing.
What town where you from? I'm thinking the guy who wrote that article may have been from Mostar if he was that close to Croatia? I'm thinking Sarajevo was higher population. Many litle towns were surrounded and seiged too. Olovo comes to mind.