Sunday, January 8, 2023

Goblins and Digging

Thinking back to tribal goblins, I still like the idea of having goblins operate primarily in the Morlock Model, hiding in underground dens during the day and then emerging to pillage the countryside at night.  This makes rooting out goblins clearly an adventurer activity rather than a problem you can throw mercenaries at - you can fight them in their holes or you can fight them at night, but either way you're gonna be fighting them in the dark.

 


But something I'm still fiddling with is how viable it is for goblins to get established.  Say you've got a warband of 30 goblins and you're sent by your chief to go start digging a warren near a human town.  How do the numbers work out in ACKS?  I'm not aiming for perfectly ACKS RAW-compliant here so much as plausibility-checking.

Per Domains at War: Campaigns page 81, digging 20 cubic feet of slapdash unpaved underground tunnel costs 1 gp in labor.  Depending on whether you factor in their poor encumbrance, goblins might have either 0 labor rate or 1sp/day, so optimistically with your 30 goblins and appropriate tools you can dig 3gp/day, or 60 cubic feet.  A 10' cube is 1000 cubic feet, so 16 days to dig one of those.  If you go with 5' ceilings instead and assume a sleeping goblin takes 12 square feet of floor space at a bare minimum, you need 360 square feet of floorspace, 1800 cubic feet, 90gp, 30 days to house just your lads very uncomfortably.  That's a long time to be sleeping in tents on the surface where random encounters can eat you, or where a nearby domain's garrison might discover you by reconnaissance rolls if you're in the same 24-mile hex.

We might consider the possibility that goblins are good at digging, or at least goblin pioneers are selected for their digging ability, and give them the Labor proficiency, bringing their individual construction rate up to 2sp/day or 6gp/day for the warband as a whole.  (If we give goblins Labor as stock, this also explains why orcs and hobgoblins like dragooning them into doing grunt work)  So then we're back down to about two weeks to dig a reasonable shelter.

What else could we do to bring the digging rate up?  The answer, naturally, is workbeasts.  The rules on using non-sentient workbeasts for construction projects in Domains at War aren't entirely clear.  One optimistic interpretation would let you use a workbeast as a number of unskilled laborers equal to its encumbrance over 5st, maybe with a handler.  So for example a mule is worth about four guys, which seems plausible if part of your work is hauling rocks and pieces of wood to use as supports.

But you know what has more carrying capacity than a mule, is more tolerant of low ceilings, fits goblin aesthetic, and eats garbage?  Giant beetles.  A giant fire beetle has 30 stone of encumbrance, so it's worth about six guys.  And adding some fire beetles to a goblin warband is not massively more terrifying for low-level PCs, like adding wargs, giant shrews, or ankhegs would be, if you want to use a goblin outpost under construction as an adventure site for 1st-2nd level characters.  Plus, having some beasts of burden to carry supplies from your point of departure makes a lot of sense; assuming goblins eat as much as a man, you're looking at 30 stone of supplies per week, which is conveniently the carrying capacity of a single beetle.  And it isn't totally implausible that you could train the beetles to do the actual digging, versus hauling dirt like you'd get with mules.

So let's say we add five fire beetles to our warband; a large encounter or a small lair, depending on how you look at it.  A trained fire beetle has a labor rate of 6sp/day based on its carrying capacity, so the five of them are another 3gp/day.  Even if we have to allocate a gobbo or two to supervise them, we have about doubled our digging power for a relatively small increase in required footprint (the beetles are only 2.5 feet long and being bugs may be able to rest in weird spots like on walls and ceilings.  Being 2.5 feet long, I imagine the pack saddles for carrying 300lb must be quite silly-looking, which, again, is pretty goblin).  With trained diggers and some beetles, we can get up around 9gp/day, which lets us dig a 10' cube every 5-6 days, and get a minimal shelter up in a similar timeframe.  In a second week, you could have cramped room enough for a second warband, and then they start digging too...  If you have a 6-warband village, you could have space for all your soldiers in a couple weeks, and then space enough for your noncombatants in a couple months.

Another interesting question, I suppose, is about linear distance.  If you wanted a long tunnel you could move 3 1/2'-tall troops through single-file, maybe you go down to 4' ceiling and 3' wide, so 12 cubic feet per foot of linear distance, or 0.6gp of labor.  Assuming you let that parallelize so they can bring their full power to bear on that 12 square foot surface, your digging crew with 9gp/day could dig about 15 feet of tunnel per day, or a 1-mile tunnel in a year.  So inter-hex tunnels probably aren't constructible in the timeframes of a typical campaign, even under the most charitable assumptions.  Maybe for a project like that, linking up to a well-established "city" type lair, you bring out the giant tiger beetles, with 250st carrying capacity and so 5 gp/day construction rate each.

In any case, I feel pretty OK with having goblins digging burrows and tunnels during the course of a campaign provided they have some helpful arthropods along.

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