According to Urban Legends™ in 2004, when Bulgaria entered NATO, we had a single Panzer IV converted to a tank tug operational. The high brass taught it would be embarrassing, so they hid it away.
Source is hearsay of course
We, the capable, led by the clueless, do the impossible for the good of the ungrateful. And we did so much , with so little, in so small time, that we are now qualified to make anything from nothing.
Konstantin Josef Jireček