Here's the save.
The Infantry unit in question is in hex 2412 (the one being targeted). There's a bldg at 2513 that I thought would block the unit from taking damage, since shots would have to be aimed at a higher floor, not one that the infantry was on. I was, however, quite wrong, much to that unit's dismay. And demise. The bldg collapses on them at the end of the turn.
Goodbye motorized infantry unit that I forgot to upgrade with better armor or towed guns when I had the chance. We barely knew ye.
:'(
ajh