There are a number of Leves in Ishgard that contain juicy lore. Here are a few pertaining to Dragoons that I was able to find:

A dragon's natural armor may seem impenetrable to an untrained eye, but a true dragoon knows well whence the vulnerabilities lie—a darkened spot, a bent plate, or if one is lucky, a barren patch. These days, too many young bloods sign up for the training to join our noble ranks without showing a shred of decent talent, hence I have decided to thin out the crop through a trial. If the men can identify and destroy the spots on targets wrapped in scaleskin, they may continue their training. If they fail, they are to relinquish their weapon and accept pursuit of a less virtuous craft. To fashion proper targets, I ask you to fetch me dragon scales of decent quality, and lest you have an army at your disposal, it might be quicker to obtain them by slaying the enemy's biast cousins in the Churning Mists.
Among the aspiring Knights Dragoon are a talented few who practice jumping attacks in equipment crafted from adamantite, the weight of which will help them to crush a dragon's skull as an eggshell. Alas, one such youth misstepped during his training and landed among the crags, breaking both his legs and armor in the impact. Though his injuries will heal, he requires a new pair of leg guards, and I would entrust none other but a skilled craftsman with the task.
We dragoons are a proud sort who often charge into the heat of battle, but that is not to say deception is without merit. When shadows abound, we sometimes make use of wooden decoy dummies with arms and wings manipulated by gears which resemble dragons from afar, to create an illusion of comrades in the vicinity. However, we lack the materials to replicate dragon scales. We seek an experienced adventurer willing to journey to the Churning Mists and skin Dravanians for this purpos
Elder members of the Knights Dragoon are known to prefer lances smithed from pommel ore - a hard substance that, while difficult to weild, is believed to make the finest, sharpest heads. Unfortunately, the locations of the few remaining veins in Dravania were known only to the Sharlayans who took the information back with them to the Old World fifteen summers ago. If you were to find a vein of decent quality, I would pay much for the material.
[B]The candidates for the Knights Dragoon are always under intense pressure that leaves both their heads and faith pounding by the end of a training session, to which some forget even the most common of sense. One of the youngbloods was daft enough to place his sallet next to a roped and very well-fed chocobo during his training respite. Needless to say, no amount of water or prayer is going to get the unholy smell of droppings and shame scraped out of the metal. He will need a replacement helmet posthaste.
As their training forces the Knights Dragoon to respond violently to the screams of dragons, the candidates to join the ranks prefer to use sallets of titanium. Rumor has it that not only is the headpiece as light as a feather, but as the wind blows through the crevices, it mimics such a wail and allows the wearer's hatred to course through their veins tenfold at the mere sound.
The hopefuls of the Knights Dragoon are near the end of their training drills and have grown overconfident with their newfound power in the dragoon jump. A handful boast themselves invincible, and that they are more than ready to practice the jump in heavy adamantite armor, just as those veterans among the ranks. I have warned them that none but a true master of the art would be able to perform the jump with precision in such heavy armor, yet they heed me not. Very well then, the fools will know their folly once removed from the lists due to shattered ankles.
The dragoons tasked with aiding House Durendaire in retaking the Stone Vigil have proposed the usage of the formation known as the Barbed Adamantoise, in which men join shields and march in unison with protruding spears to deter attack. Adamantite spears are one of the few weapons strong enough to shatter Dravanian skulls and will prove worth a trial run.
At last, the final trials for the knights dragoon are upon us, and this year's candidates have proven to be the most propitious in quite a long time—all from fine bloodlines, all burning with acrimony towards their scaly adversaries. They call the trial a "mock battle," yet the only thing mocking about it is that their adversary is not a full-grown wyrm. They will have full reign to demonstrate their skills, thus the birth of a dragoon merits celebratory armor for use in the test.
When we make our rounds to the Congregation's training facilities to choose hopefuls for the Knights Dragoon, I have noticed the uptick in lowborn numbers among the new recruits. While it is good to give them the benefit of the doubt as their desperate situation allows them to take more risks than their highborn counterparts, sense it does not make to give candidates quality armor from the start—they have a nasty habit of dropping.
Children who lose their fathers to the jagged maws of Dravanians make fine candidates for the ranks of the dragoons, for theirs is a special contempt which cannot be found in the hearts of ordinary men. The commanders can oft tell who they are, and thus seek to nurture that hatred through painful sessions which force them to relive their nightmares. The ranks will be thinned out sure enough, hence we must make use of breeches tough enough to withstand the grazing of sharp teeth, but expendable enough for those who crack from the pressure.