I think that the habit kicked in because so many of my builds were intended as prizes. Looks better to see a named build on the poster. Though come to think only Dwarfmouth Gate actually had the battle named after it. And that was also the one to get stolen.
A dwarf sally from a fortified gate, reversing the typical role - the dwarfs were an attacking force trying to break the siege, not just trying to defend the walls. They needed to make it to the enemy deployment zone. The orcs won if they could shatter the gate. If both or neither had happened then it would have been a tie. I had a Grendel dwarf Golem and steam tank all painted up for it, too.
The Auld Grump