While looking for something else, I ran across an interesting site, Armamentarium, devoted to "Roman Arms and Armour". It seems to be dormant, since it has not been updated in almost five years and most of the elaborately-indexed contents are only titles. (If you root around, you will find some nice illustrations of ancient weapons.) However, it does include Vegetius' fascinating (and short) account of the traditional training of Roman soldiers, in alternating Latin and English. Vegetius is known today for one line, "if you want peace, prepare for war" (si vis pacem, para bellum), but he wrote an entire treatise on military matters.
Interesting aspects of Roman training included: