one with another, cutting off separate portions for their own and setting up individual monarchies, this land then first attained prominence under a certain Arsaces from whom their succeeding rulers have received the title of Arsacidae.  By good fortune they acquired all the neighboring territory, kept control of Mesopotamia by means of satrapies, and finally advanced to so great glory and power as to fight against the Romans at that period and to be considered worthy antagonists up to present time.[61] They are really formidable in warfare and possess the greater reputation, in spite of never having gained anything from the Romans and having parted with certain portions of their own domain, because they have not yet been enslaved, but even now carry wars against us to the end, whenever they get into conflicts. [-15-] About their race and their country and the peculiarities of their customs many persons have spoken, and I have no intention of compiling an account.  But it is fair to mention in what follows their equipment of arms, and the way they handle a war:  the examination of these details properly concerns the present narrative, since it here needs to introduce them.  The Parthians make no use of a shield, but their forces consist of mounted archers and pike-bearers, mostly in full armor.  Their infantry is small, made up of the weaker persons; hence it may be said they are all archers.  They practice from boyhood, and the sky and the country cooeperate with them for two good ends.  The latter, being for the most part level, is excellent for raising horses and very suitable for riding over with horses.  Therefore even in war the people lead about whole droves so that they can use some horses at one place and others at another, can ride up suddenly from a distance and also retire to a distance speedily.  The sky above them, too, which is very dry and contains not the least moisture, affords them perfect opportunity for archery, except in the winter.  For that reason they make no campaigns in any direction during the winter season.  But the rest of the year they are almost invincible in their own country and in any that has similar characteristics.  By long custom they can endure the sun, which is very scorching, and they have discovered many remedies for the scantiness and difficulty of a supply of drink,—­a fact which is a help to them in repelling without difficulty the invaders of their land.  Outside of this district and beyond the Euphrates they have once or twice exercised some sway by battles and sudden incursions, but to fight with any nation continuously, without stopping, is not in their power, when they encounter an entirely different condition of land and sky and have no supplies of either food or pay.