As brought up by @evazion in topic #24919, military vehicle does not make for an especially useful tag at this point in time.
Semi-related is that I had originally been typing up a topic on the necessity, or lack thereof, of a tag for MRAPs since it did not appear as though they could be reasonably searched for... this was until I realised that armoured vehicle helpfully excludes tanks, thereby making it actually usable for searching and also invalidating the need for a specific MRAP tag which might at most be populated by ~100 posts (if that, and most of them by dead-robot). Still, this is hardly intuitive, I mean tanks are obviously vehicles and also armoured... is there anything that might be done to armoured vehicle to make its purpose more obvious?