Some of the regiments can be recruited in specific locatations (this list is a work in progress, just like the mod itself):

List contains name of the regiment and the title/titles (baronies in case of AoW sub-mod) needed to recruit them:
In the case of AGOT added regiments, is mostly the case of counties, not baronies.

Armies of Westeros regiments that need titles ownership:

 1. The Twins Guards - The Twins
 2. The Sons of the North - Winterfell
 3. Guards of Winterfell  - Winterfell
 4. The Dreadfort Impalers - The Dreadfort
 5. Guardians of the Bloody Gates - The Bloody Gate
 6. The Shadows of Raventree - Raventree Hall
 7. Southstone Footmen - Stone Hedge
 8. Knights of the Rock - Casterly Rock
 9. Clegane Footmen - Clegane's Keep
10. Rainwood Hunters - Rain House, Ironrod, Greenstone, Bluegrove, Amberly, Castle Corwin, Paintwood, Mintspoon, Rain's Neck Keep, Swullock, Tower of Owls, White Owl's Hallow, Whitehead Watch, Wailingkeep, Bronzeaxe, Armigan, Seahold and Woodhall
11. Marcher Footmen - Stonehelm, Blackneck, Lonmouth Hall, Lontower, Swellcrest, Bayfall, Blackhaven, Bonewatch, Forkbolt, Deadmere, Raven Rock, Maid's Scar, Castle Greyhawk, Kinehold, Hobbtower, Filch March, Harvest Hall, Boldingfield, Death's Head, Hawkmoth, Ressview, Shaker Hold, Fieldmont, Spikelet, Nightsong, Melody, Sour Hill, Nailstone, Kingfeast, Thrushcastle, Sparenote, Dead Rise Keep
12. Stormbringers - Storm's End
13. Guardians of the Marches - Starpike, Marchrise, Rutmark, Torrentpeak, Ant Hill, Marchyng, Leygood Keep, Bellcross Hill, Swellwood, Strike's Roll, Sunnypoint, Castle Dywell, Grandmercy, Fieldcrest, Glebecastle, Archer's Head, Horn Hill, Stride, Mount Ambit, Bowman's Keep, Cornerstone, Westmore, Castle Russeting, Sidestone, Cresthaven, Vernpeaks, Twin Eagles, Grennwhyte, Blind Nest, Sunwatch, Covenne's Hollow
14. Knights of Highgarden - Highgarden
15. Starfall Swordmasters - Starfall
16. Guards of the Hightower - The Hightower

AGOT regiments that need titles ownership:

17. Gold Cloaks - King's Landing (County title and not barony in this case)
18. Sea Watch - County of King's Landing, Dutchy of King's Landing or The Iron Throne
19. Red Cloaks - County of Lannisport (not barony)
20. Grey Cloaks - County of Oldtown (not barony)
21. Cailin Archers - County of Moat Cailin (not barony)