Mass Combat System Play Analysis

So, Friday before last, I got to test run my mass combat system. Essentially, I tricked my players into playing a hex & chit wargame with my by disguising it as Dungeons & Dragons, but it actually went really well! Much better than I expected, in fact.

The sides were comprised of about 40k humans, elves, dwarves, and halflings and just over 100k (mostly low-level) undead. The PC factions were led by 20th level Humans and max-level demihumans, while the undead were led by 9HD vampires and a level 30 MU lich.

Most undead units were 5k in size, each taking up 2 hexes. Smaller units (1000 or less) took up 1 hex and ignored facing rules, and a pair of 10k strong human infantry took up 3 hexes.

The undead’s objectives were to a)Cross the map with one of a various combination of units or b)kill a certain number of the PC heroes. The PC’s objectives were to either a)eliminate 6 units, b) destroy the lich’s siege engines, or c) force the lich to use half of his spells.

While I gave my players a few options of how they could set-up (envelopment, one-sided flanks, meeting engagement, or a prepared defense), they opted to run a prepared line defense in the middle, with cavalry on the flanks.

In about 11 turns over the course of 5 hours, the PC’s pulled off a stunning upset victory against the Lich.

Here’s why:

  • I forgot to put Permanent Fly on the Lich; I wasn’t going to pull a fast one after I’d already showed everyone the ins and outs of what I’d be running. This deprived him of his ability to do ranged spell damage as often as he should’ve been able to.
  • I allowed some of the smaller “special” units of undead to count towards the 6 unit count; I also forgot that I shouldn’t have allowed wights to take casualties from normal units.
  • The lich had no missile troops. My players did pretty well with their archers and skirmishers. While I did manage to collapse their left flank, many of my troops did so right into clerics who could blow up the weaker skellies.
  • Vampires are too weak to go up against the PC party I’d created pre-gens for; I should’ve used much more powerful undead, but I wanted to keep things simple.
  • Magic Missile was broken; I’ll fix it when I rewrite the rules; it should’ve been a fixed amount of damage based on the unit size (perhaps in relation to the target unit’s average HD) rather than multiplied by the die-roll. The elves were doing maybe 1/3 to half a brigade worth of damage per round.
  • Because I did not want to deal with 3 full levels of spells I didn’t have physical books for, the Lich didn’t have a number of abilities and additional reality-shaping spells that would’ve made this a cakewalk. As such, while he did death-touch a 20th level fighter at one point and began to rout PC units just by wading into the fray himself, he couldn’t have held his own if the PCs ganged up on him, in large part because of an absence of “contingencies”.

Here’s what worked:

  • The combat damage system. Once everyone wrapped their head around how easy it was to figure 10% of the highest two digits, calculating damage was a breeze. The rolls to hit and against armor class were simple enough that the players figured out how the system worked pretty quickly.
  • Leader Combat. Well, okay, it kind of worked. It needs to be improved maybe, or maybe implementing it on a smaller scale would work better. Really, the PCs cleaved through the Vampire colonels like butter; the unit regulars could only hit PCs on 20 and even the Vampires had a tough job of landing a blow on the heavily armored PCs.
  • Cavalry are weak in numbers but can do massive damage. They do the most damage with charges. It made me smile when the players came to the realization on their own that they were using their cavalry wrong; they realized what they SHOULD have been doing was, instead of leaving their cavalry in melee, withdrawing after a charge, regrouping far enough away that they couldn’t be attacked by a charging unit, then charge again from a flank to get the charge damage bonus.
  • Turning worked almost just as planned. 2d6 x 10% of a cleric unit divided by the defending unit’s hit dice. I required that the unit the clerics were attempting to turn must have line of sight on the cleric unit. This meant that cleric units staying behind other units, performing first aid, couldn’t turn; they had to come out where the undead could see them.
  • Giving the cleric units a 3 shot ability to prevent ½ damage to an adjacent unit, up to the total number of clerics in the unit, worked pretty well.

Here’s what was a little iffy:

  • The Combat Order in general worked just fine, and I’m still sold on doing initiative per melee, though the players did say that it slowed things down a bit. BUT if you weren’t using initiative per melee, I’d probably go with the following order within the combat phase:
    • Declare unit combat pairings and splits
    • Unpaired attackers do their damage first
    • Paired/split attackers do damage simultaneously (i.e. use the unit sizes of all units at the beginning of combat to calculate damage, rather initiative-loser potentially takes losses and inflicts fewer casualties)Now what’s with split attacks? When units were being attacked by more than one unit, I allowed the defending unit to make attacks against all attackers, splitting damage proportionally.
  • Magic. Some of the spells worked out, others didn’t. The biggest problem was that I used 1d6+1 x 10% of the casting unit calculate damage for Magic Missile. While it was fine for the 500 strong MU unit, it made the 3500 strong elf unit a murder machine. Additionally, there are just some spells that either don’t really work for mass combat or would require some additional development

Here’s what could stand some further development:

  • Accounting for hit die differences. This isn’t something I did, in part because a) I didn’t have time and b) it would’ve bogged down an initial test more than I wanted. I DID have one unit of 100 bone golems where I had their HP as the true unit strength, and, because they were a small unit, each individual could inflict a kill. So, with 4 attacks, the unit could theoretically kill 400 per round while they had an effective HP of 2400 instead of 100.I treated the PC units as “elites”, using the 2nd column of the to-hit and saves, and the ability to cast spells as a 5th level MU x3. This didn’t mean that everyone in the unit was 5th level, just that the average quality of the troop was such that it had a to hit bonus and a save bonus. This wasn’t reflected in unit strength/hit dice.

    The starkest difference was between skeletons and zombies, 1 hit die monsters vs. 2 hit die monsters; in theory, the zombies should be twice as hard to kill. I didn’t treat it that way (except for Turn results). You could do some tweaks to kills, where there’s a base 10% damage then reduce it proportionally by the number of hit dice. For monsters with more than 3 hit die, I think it makes sense to treat them like I did the Bone Golems (a large group of individuals attacking and simultaneously, while tracking the collective HP, but not treating them truly as a regular unit per the system). Because really, when the bone golems attacked, I was rolling 4 attacks for each one once rather than 100 times, and therefore assumed that those attacks all succeeded against individuals in the defending units rather than an attack against the unit itself using unit to unit resolution. This may actually be the best fix, as it can account for smaller numbers of large monsters (ogres, owl bears, whatever) fighting against mass combat scale units. The entire unit may not be attacking monsters, but all of the monsters are attacking someone in the unit.

  • Morale. The morale mechanics ended up not being used or tested, in part because I didn’t really write them down, so meh. Also, being undead, the Lich’s units weren’t subject to morale per-se. The players didn’t quite figure out just HOW killing the Vampire colonels affected the undead units. Being undead, they didn’t break and flee; they kept fighting, though they didn’t pull back or move further. I noted each time a vampire colonel was defeated that they dropped a sword that glowed black. These were +1 swords of control undead; if any PC had picked one up, they could either command or dispel the brigade the Vampire had been leading, but no players bothered.
  • Fleshing out the system for purposes of accounting, to better tie it to your B/X game. There are book prices for mercenaries but I think it would be worth crunching the numbers for custom equipping units, as well as figuring what “elite” means for both cost and ability (especially for casters).

I really think that there’s some potential to this system. It would absolutely work great with fewer units and at lower levels, I think, but hey, we wanted a stupid-high level battle against a lich.

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