The Last Bastion

The Last Bastion was a monastery in the southern Stormhorn mountains to the west of Cormyr from which The Order of the Mark trained and operated. The order was home to the "unwanted" knights of Cormyr, composed largely of half-breeds, plane-touched and those of either celestial or fiendish ancestry. They even accepted women into their ranks. The order maintained a constant vigil over the Thaycreep, venturing to the ruined kingdom of Thay to keep the undead at bay and monitor the growth of the wasteland.
From the Bastion, the order planned excursions, trained and rested between sorties. They maintained a rotation of companies deploying to "The Gray" (as they called the Thaycreep). While not deployed, knights of the mark would train and study ancient texts from the Great Library (with many tomes on loan from the Silent Room, the temple of Oghma in Suzail). The maintenance of the last bastion was considered the responsibility of all members, who did their own cooking and cleaning as well as maintaining the masonry and aging timbers of the ancient monastery. The order maintained a monastic lifestyle.
The order was broken up into several "cohorts"
Scribes: Largely made up of wizards who would otherwise have joined the War Wizards' College. At least one scribe accompanies each deployment, while the rest maintain the records and lore in the library.
Chaplains: Clerics of good-aligned gods act as the religious center of the order. They accompany deployments as healers and maintain the chapel and shrines of the bastion.
Scouts: Those whose talents lay in tracking, staying hidden and attacking from the shadows joined the scouts. Rogues and rangers were most welcome here. While not on deployment, the scouts hunted to keep the order's larders well stocked.
Legates: Paladins and other warriors who fought at the forefront against the dead. The legates were the de-facto lieutenants of each deployment, responsible for maintaining order within the ranks and making strategic decisions. While not on deployment, the Legates were responsible for training recruits and maintaining the training regimen of the order.
Notable members:
Ardek Lorens, a half-orc paladin of Helm and Grand Master of the Order. A veteran of many campaigns in the Thaycreep, he had maintained the order at its full strength for nearly 15 years until the war with Sembia and the growing threat of undead in the Thaycreep reduced their numbers in the last 2 years.
Dorn, an aasimar Paladin of Helm who traveled to Elturel to study the companion and was whisked away to hell along with it. He returned 2 years later accompanied by (and a member of) the hellraisers.
Pyros, a fire genasi Chaplain from Calimshan known for her spicy cooking and affinity for burning undead to a crisp in divine flames. Rumored to be the daughter of one of the famed Planeswalkers (so she claims).
Red, a large tiefling fighter who famously rode an ogre zombie into a horde of ghouls. Wields a massive flametongue greatsword he calls "father."

Leader: Grand Master Ardek Lorens (half-orc Paladin of Tyr)
Members: 500 (at its height), now reduced to roughly 100