… how much value might a heavily armored fighter or warrior be carrying around on their backs in the real world? Because I think the answer here is informative.

Here we do have some significant price data, but of course its tricky to be able to correlate a given value for arms and armor with something concrete like wages in every period, because of course prices are not stable. But here are some of the data points I’ve encountered:

We don’t have good Roman price data from the Republic or early/high Empire, unfortunately (and indeed, the reason I have been collecting late antique and medieval comparanda is to use it to understand the structure of earlier Roman costs). Hugh Elton¹ notes that a law of Valens (r. 364-378) assessed the cost of clothing, equipment and such for a new infantry recruit to be 6 solidi and for a cavalryman, 13 solidi (the extra 7 being for the horse). The solidus was a 4.5g gold coin at the time (roughly equal to the earlier aureus) so that is a substantial expense to kit out an individual soldier. For comparison, the annual rations for soldiers in the same period seem to have been 4-5 solidi, so we might suggest a Roman soldier is wearing something like a year’s worth of living expenses.²

We don’t see a huge change in the Early Middle Ages either. The seventh century Lex Ripuaria,³ quotes the following prices for military equipment: 12 solidi for a coat of mail, 6 solidi for a metal helmet, 7 for a sword with its scabbard, 6 for mail leggings, 2 solidi for a lance and shield for a rider (wood is cheap!); a warhorse was 12 solidi, whereas a whole damn cow was just 3 solidi. On the one hand, the armor for this rider has gotten somewhat more extensive – mail leggings (chausses) were a new thing (the Romans didn’t have them) – but clearly the price of metal equipment here is higher: equipping a mailed infantryman would have some to something like 25ish solidi compared to 12 for the warhorse (so 2x the cost of the horse) compared to the near 1-to-1 armor-to-horse price from Valens. I should note, however, warhorses even compared to other goods, show high volatility in the medieval price data.

As we get further one, we get more and more price data. Verbruggen (op. cit. 170-1) also notes prices for the equipment of the heavy infantry militia of Bruges in 1304; the average price of the heavy infantry equipment was a staggering £21, with the priciest item by far being the required body armor (still a coat of mail) coming in between £10 and £15. Now you will recall the continental livre by this point is hardly the Carolingian unit (or the English one), but the £21 here would have represented something around two-thirds of a year’s wages for a skilled artisan.

Almost contemporary in English, we have some data from Yorkshire.⁴ Villages had to supply a certain number of infantrymen for military service and around 1300, the cost to equip them was 5 shillings per man, as unarmored light infantry. When Edward II (r. 1307-1327) demanded quite minimally armored men (a metal helmet and a textile padded jack or gambeson), the cost jumped four-fold to £1, which ended up causing the experiment in recruiting heavier infantry this way to fail. And I should note, a gambeson and a helmet is hardly very heavy infantry!

For comparison, in the same period an English longbowman out on campaign was paid just 2d per day, so that £1 of kit would have represented 120 days wages. By contrast, the average cost of a good quality longbow in the same period was just 1s, 6d, which the longbowman could earn back in just over a week.⁵ Once again: wood is cheap, metal is expensive.

Finally, we have the prices from our ever-handy Medieval Price List and its sources. We see quite a range in this price data, both in that we see truly elite pieces of armor (gilt armor for a prince at £340, a full set of Milanese 15th century plate at more than £8, etc) and its tricky to use these figures too without taking careful note of the year and checking the source citation to figure out which region’s currency we’re using. One other thing to note here that comes out clearly: plate cuirasses are often quite a bit cheaper than the mail armor (or mail voiders) they’re worn over, though hardly cheap. Still, full sets of armor ranging from single to low-double digit livres and pounds seem standard and we already know from last week’s exercise that a single livre or pound is likely reflecting a pretty big chunk of money, potentially close to a year’s wage for a regular worker.

So while your heavily armored knight or man-at-arms or Roman legionary was, of course, not walking around with the Great Pyramid’s worth of labor-value on his back, even the “standard” equipment for a heavy infantryman or heavy cavalryman – not counting the horse! – might represent a year or even years of a regular workers’ wages. On the flipside, for societies that could afford it, heavy infantry was worth it: putting heavy, armored infantry in contact with light infantry in pre-gunpowder warfare generally produces horrific one-sided slaughters. But relatively few societies could afford it: the Romans are very unusual for either ancient or medieval European societies in that they deploy large numbers of armored heavy infantry (predominately in mail in any period, although in the empire we also see scale and the famed lorica segmentata), a topic that forms a pretty substantial part of my upcoming book, Of Arms and Men, which I will miss no opportunity to plug over the next however long it takes to come out.⁶ Obviously armored heavy cavalry is even harder to get and generally restricted to simply putting a society’s aristocracy on the battlefield, since the Big Men can afford both the horses and the armor.

But the other thing I want to note here is the social gap this sort of difference in value creates. As noted above with the bowman’s wages, it would take a year or even years of wages for a regular light soldier (or civilian laborers of his class) to put together enough money to purchase the sort of equipment required to serve as a soldier of higher status (who also gets higher pay). Of course it isn’t as simple as, “work as a bowman for a year and then buy some armor”, because nearly all of that pay the longbowman is getting is being absorbed by food and living expenses. The result is that the high cost of equipment means that for many of these men, the social gap between them and either an unmounted man-at-arms or the mounted knight is economically unbridgeable.⁷

Bret Devereaux, “Fireside Friday, January 10, 2025”, A Collection of Unmitigated Pedantry, 2025-01-10.

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1. Warfare in Roman Europe AD 350-425 (1996), 122.
2. If you are wondering why I’m not comparing to wages, the answer is that by this point, Roman military wages are super irregular, consisting mostly of donatives – special disbursements at the accession of a new emperor or a successful military campaign – rather than regular pay, making it really hard to do a direct comparison.
3. Here my citation is not from the text directly, but Verbruggen, The Art of War in Western Europe during the Middle Ages (1997), 23.
4. From Prestwich, Armies and Warfare in the Middle Ages (1996).
5. These prices via Hardy, Longbow: A Social and Military History (1992).
6. Expect it no earlier than late this year; as I write this, the core text is actually done (but needs revising), but that’s hardly the end of the publication process.
7. Man-at-arms is one of those annoyingly plastic terms which is used to mean “a man of non-knightly status, equipped in the sort of kit a knight would have”, which sometimes implies heavy armored non-noble infantry and sometimes implies non-knightly heavy cavalry retainers of knights and other nobles.