And just to demonstrate its longevity, T-34s were used in the Balkans in the late 80s and early 90s. If memory serves, there's still the wreckage of one on a hill-top somewhere between Velika Kladusa and Banja Luka, that was destroyed while indiscriminantly shelling a village. The local residents took exception to this and snuck up to surround the thing with mines (so the story goes), so when it moved--bang. I saw the wreck from a Griffon whose pilot was kind enough to indulge me in a bit of airborne military sight-seeing, while I was on my strat recce.
There were all sorts of weird and wonderful things used in that war--T-34s, M18 Hellcat tank destroyers, all sorts of old WP equipment (of course), and things of local design cobbled together from tractors and farm equipment, scrap steel plate and miscellaneous weapons.