War parties, as noted, often moved without bringing the entire camp, the non-combatants or the sheep with them. This was actually a crucial operational concern on the steppe, since the absence of a war party might render an encampment – stocked full of the most valuable resources (livestock, to be clear) – effectively unguarded and ripe for raiding, but at the same time, attempting to chase down a moving encampment with an equally slow moving encampment was obviously a non-starter. Better to race over the steppe, concealed (as we’ll see) and quick moving to spring a trap on another group of nomads. But how did a war party make those high speed long-distance movements over the steppe? Horse-string logistics (a term, I should note, that I did not coin, but which is too apt not to use).

Each steppe warrior rode to battle with not one horse, but several: typically five to eight. For reasons that will rapidly become obvious, they preferred mares for this purpose. The Steppe warrior could ride the lead horse and keep the rest of them following along by connecting them via a string (thus “horse-string logistics”), such that each steppe warrior was his own little equine procession. These horses are, you will recall, fairly small and while they are hardy, they are not necessarily prodigiously strong, so the warrior is going to shift between them as he rides, sparing his best mount for the actual fight. Of course we are not looking at just one warrior on the move – that would be very dangerous – but a group on the move, so we have to imagine a large group (perhaps dozens or hundreds or even thousands) of warriors moving, with something like 5-8 times that many horses.

[Edit: It is worth noting that a horse-string war party might well also bring some number of sheep with them as an additional food supply, herding them along as the army rode. So even here, sheep maintain their importance as a core part of the subsistence system.]

Now of course the warriors are going to bring rations with them from the camp, including milk (both liquid in leather containers and dried to qurut-paste) as well as dried meat. But the great advantage of moving on mares is that they when they are lactating, mares are already a system for turning the grass of the steppe into emergency rations. As Timothy May (op. cit.) notes, a mare produces around 2.25-2.5 quarts of milk in excess of the needs of her foal per day during her normal five-month lactation period, equal to about 1,500kcal/day, half of the daily requirement for a human. So long as at least two of the horses in the horse-string were lactating, a steppe warrior need not fear shortfall. This was more difficult in the winter when less grass was available and thus mare’s milk became scarce, which could impose some seasonality on a campaign, but a disciplined band of steppe warriors could move massive distances (the Mongols could make 60 miles a day on the move unencumbered, which is a lot) like this in just a few months.

In adverse conditions (or where time permitted because meat is tasty), steppe warriors on the move could also supplement their diet by hunting, preserving the meat as saddle-jerky. In regions where water became scarce, we are frequently told that the Mongols could keep going by opening a vein on their horse and drinking the blood for both nourishment and hydration; May (op. cit.) notes that a horse can donate around 14 pints of blood without serious health risk, which is both hydrating, but also around 2,184kcal, about two-thirds of the daily requirement. This will have negative impacts on the horses long term if one keeps doing it, so it was an emergency measure.

The major advantage of this kind of horse-string logistics was that a steppe warrior party could move long distances unencumbered by being essentially self-sufficient. It has a second major advantage that I want to note because we’ll come back to it, they light no fires. For most armies, camp fires are essential because food preparation – particularly grains – essentially requires it. But a steppe warrior can move vast distances – hundreds of miles – without lighting a fire. That’s crucial for raiding (and becomes a key advantage even when steppe warriors transition to taking and holding territory in moments of strength, e.g. the Mongols) because sight-lines on the steppe are long and campfires are visible a long way off. Fireless logistics allow steppe warriors to seemingly appear from the steppe with no warning and then vanish just as quickly.

That said, these racing columns of steppe warriors, while they could move very fast and be effectively independent in the short term, don’t seem generally to have been logistically independent of the camp and its herds of sheep in the long term. Not only, of course, would there be need for things like hides and textiles produced in the camp, but also the winter snows would drastically reduce the mares milk the horses produced, making it more difficult to survive purely on horse-string logistics. Instead, the camp formed the logistical base (and store of resources, since a lot of this military activity is about raiding to get captives, sheep and horses which would be kept in the camp) for the long range cavalry raids to strike out from. To the settled peoples on the receiving end of a Mongol raid, it might seem like the Mongols subsisted solely on their horses, but the Mongols themselves knew better (as would anyone who stayed with them for any real length of time).

Bret Devereaux, “That Dothraki Horde, Part II: Subsistence on the Hoof”, A Collection of Unmitigated Pedantry, 2020-12-11.