No one kingdom or province is able to resist the Tartars; because they use soldiers out of every country of their dominions. If the neighbouring province to that which they invade will not aid them, they waste it, and with the inhabitants, whom they take with them, they proceed to fight against the other province. They place their captives in the front of the battle, and if they fight not courageously they put them to the sword. Therefore, if Christians would resist them, it is expedient that the provinces and governors of countries should all agree, and so by a united force should meet their encounter.
Soldiers also must be furnished with strong hand-bows and crossbows, which they greatly dread, with sufficient arrows, with maces also of strong iron, or an axe with a long handle. When they make their arrowheads, they must, according to the Tartars' custom, dip them red-hot into salt water, that they may be strong enough to pierce the enemies' armour. They that will may have swords also and lances with hooks at the ends, to pull them from their saddles, out of which they are easily removed. They must have helmets and other armour to defend themselves and their horses from the Tartars' weapons and arrows, and they that are unarmed, must, according to the Tartars' custom, march behind their fellows, and discharge at the enemy with longbows and cross-bows. And, as it has already been said of the Tartars, they must dispose their bands and troops in an orderly manner, and ordain laws for their soldiers. Whosoever runs to the prey or spoil, before the victory is achieved, must undergo a most
Severe punishment. For such a fellow is put to death among the Tartars without pity or mercy.
The place of battle must be chosen, if if is possible, in a plain field, where fhey may see round about; neither must all troops be in one company, but in many, not very far distant one from another. They which give the first encounter must send one band before, and musf have anofher in readiness fo relieve and support the former in time. They must have spies, also, on every side, to give them notice when the rest of the enemy's bands approach. They ought always to send forth band against band and troop against troop, because the Tartar always attempts to get his enemy in the midst and so to surround him. Let our bands take this advice also; if the enemy retreats, not to make any long pursuit after him, lest according to his custom he might draw them into some secret ambush. For the Tartar fights more by cunning than by main force. And again, a long pursuit would tire our horses, for we are not so well supplied with horses as they. Those horses which the Tartars use one day, they do not ride upon for three or four days affer. Moreover, if fhe Tartars draw homeward, our men must not therefore deparf and break up their bands, or separate themselves; because they do this also upon policy, namely, to have our army divided, that they may more securely invade and waste the country. Indeed, our captains ought both day and night to keep their army in readiness; and not to put off their armour, but at all time to be prepared for battle. The Tartars, like devils, are always watching and devising how to practice mischief. Furthermore, if in battle any of the Tartars be cast off their horses, they must be captured, for being on foof fhey shoot strongly, wounding and killing both horses and men.
Source: John de Plano Carpini, The long and wonderful voyage of Frier lohn de Plano Carpini, taken out of the 32. booke of Vincentius Beluacensis his Speculum histo-riale, available on the Internet at http;//etext. library. adelaide. edu. au/h/ hakluy t/voyages/ca rpini/