Besides the heavy war-chariots, there were also rather more comfortable and lighter conveyances: in one case two generals are spoken of ironically because they went to the front playing the banjo in a light cart, whilst their colleague from another state-- the very state they were assisting--was roughing it in a war- chariot. These latter seem to have connoted, for military organization purposes, a strength of 75 men each, and four horses; to wit, three heavily armed men or cuirassiers in the chariot itself, and 72 foot-soldiers. At least in the case of Tsin, a force of 37,500 men, which in the year 613 boldly marched off three hundred or more English miles upon an eastern expedition, is so described. On the other hand, thirty years later, a small Ts'u force is said to have had 125 men attached to each chariot, while the Emperor's chariots are stated to have had 100 men assigned to each. In the year 627 a celebrated battle was fought between the rival powers of Ts'in and Tsin, in which the former was utterly routed; "not a man nor a wheel of the whole army ever got back." War-chariots are mentioned as having been in use at least as far back as 1797 B.C. by the Tartar-affected ancestors of the Chou dynasty, nearly 700 years before they themselves came to the imperial power. The territory north of the River Wei, inhabited by them, is all yellow _loess_, deeply furrowed by the stream in question, and by its tributaries: there is no apparent reason to suppose that the gigantic cart-houses used by the Tartars, even to this day, had any historical connection with the swift war- chariots of the Chinese. Little, if anything, is said of conveying troops by boat in any of the above-mentioned countries north of the Yang-tsz River. None of the rivers in Shen Si are navigable, even now, for any considerable stretches, and the Yellow River itself has its strict limitations. Later on, when the King of Ts'u's possessions along the sea coast, embracing the delta of the Yang-tsz, revolted from his suzerainty and began (as we shall relate in due course) to take an active part in orthodox Chinese affairs, boats and gigantic canal works were introduced by the hitherto totally unknown or totally forgotten coast powers; and it is probably owing to this innovation that war-chariots suddenly disappeared from use, and that even in the north of China boat expeditions became the rule, as indeed was certainly the case after the third century B.C.