I was the one attacked. We had weeks worth of crafted gear lost due to this bug. Expensive Lordly and Masterwork stuff. We tried to retreat, but I still lost about 95% (hard to say exactly with all of the armor lost to disconnected troops) of my gear only minutes into the battle.
Based on how we've been outfitting our other battles, I'd wager I started with at least 100 MW Simple Swords, anywhere from 100 to 400 Lordly Cavalry Robes (could have been even more), exactly 10 MW Crossbows (this I paid attention to), 100 MW Bastard Swords, 100 MW Military Scythes, and 100 MW Long Spears. That covers maybe half of the gear list, and we probably lost a lot more than what I'm guessing here.