@Cruddy Leper; longbows were known tot he greeks, and the same goes for crossbows, fo which the ballista is actually the evolution of (the origional crossbow being the syracusian "gastrophetes" and could be considered a mad-mans crossbow, easilly able to outperform any other crossbow because of its size; large enough to require a man to put his weight on it to re-spring it)
@Verbose; the Roman civl war between the Caesar and Pompey records Big C's troops utlizing pikes; in theory, the use of them may have been kept up, as "small pikes" as I deem them (at 12 feet, larger then the traditional hoplite spear of 6-8 feet, but short of the average pike of the era of around 16 feet long; though monster 32 foot pikes existed, they seem to have coem ina nad out of favor relitivlly quicklly during the alexandrian era; but I dont have a great deal of evidence to substantiate that) were used on what woudl be called "early cataphracts", the Contarius troops, under the reign of Trajan; these first units seem to have been experimental, but considering that durign the course of second and third centuries, such cavalry became more and more wanted, it seems to have been successful; this heavy cavalry reliance may be the direct predessor of the medieval knight, as the gods know that while knightdom was orgnized in a psudo-late Roman, germanic fashion, that western europe outside of Rome had no cavalry tradition outside the Iberians and Guals, both absorbed by Rome.