The Miltary Orders provide the elite troops of Brevoy. They offer training and support as well as provide a modicum of status to their members. Titles and ranks are always for the lifetime of the recipient and cannot be passed to an heir. There are three Types of Order:
The main Knightly Order in Brevoy, with a number of Regional Chapters intended to reward loyalty and support of regional government and are loyal to the nation through their loyalty to their chapter commander. The order is composed of skilled combatants, both mounted and foot troops, who make up the elite forces of Brevoy. The King of Brevoy is the Knight Grand Commander of the Brevic Knights.
They are expected to help maintain the peace and enforce the law when they need to, and may take to role of Policeman, judge and executioner - if it is appropriate.
The members of these orders are united by Purpose, Ideal and Oath, but are not associated with a specific noble family or region. To become a member one must swear an oath in the presence of other (probably senior) members of the order to uphold the purpose of the order. Each order has its own (unique) Purpose, Oath and Process. Some are very formal, others much less so.
Cavaliers all belong to the order, and dedicate themselves to a group of like-minded individuals, be it a mercenary company, a religion, a nation, a band of adventurers - of something similar. These cavaliers believe in loyalty and friendship, and are willing to lay down their lives to protect their allies. It is their respect for a formal Vow of Loyalty that brings this group together, rather than any great overall purpose. They might not all share the same cause, but they all believe (fiercely) that every individual has the right to make and keep a vow of loyalty. They are a loose knit organisation without a strong central structure.
There are many different Knightly Orders that operate under the auspices of Iomedae's temples.
Chevaliers welcome all like-minded folk regardless of religion. Most are fighters, rogues, or barbarians, but sorcerers, clerics, and bards are not unheard of. Chevaliers often wear golden pins noting their patron liege or deity or the token of a lover or other for whom they fight. Membership is easily obtained by swearing an oath in the presence of another chevalier and invoking the name of who they fight for or the figure that embodies their desire to do good in the world. An adventurer-turned-innkeeper in a frontier town, a band of travelers looking for bandits, and a would-be dragon-slayer might all be chevaliers. They mix lofty intentions, unusual combat techniques, and stubborn determination into a strangely effective combination.
There is a long history of Duelling in the region and the various duelling schools are are well respected and given the same sort of status as the other fighting / military orders. The traditions are differentiated by the specific weapons and style codes that each adheres to, but they are are pulled together by their adherence to the Rules of Duelling. While there is rivalry between the traditions, there is also a mutual respect and recognition of a joint purpose. The Duelling traditions are particularly strong in Rostland, and strongest in Restov. However, you will also find duelling schools in New Steven and Silverhall. Basic Duelling is also taught within most Noble Houses, although they don't (generally) teach specialist duelling skills.