Current version (v1.0) includes all Holds!

Bandits module found here.
Wizardry module found here.

Also available on the Steam Workshop here.

Installation:
Extract the plugin in the /Skyrim/Data folder and make sure this mod is checked on the load order; that's it!

Features (Guards module):
Lore-friendly & cohesive variation in helmets, gauntlets & boots
Guards may wear a random distribute of many Heavy or Light armor sets
Guards in colder areas use more appropriate gear
New Heavy guard armour
Iron Imperial gear variant to reduce colour clashing
Thematic outfits unique to each Hold
Guards can dual wield and have weapons to match

Patch available for new guards added by Falskaar

Recommended:
Friendly Guard Helmets
aMidianBorn Book of Silence
Better Iron Weapons and Guard Armor

Compatibility:
Likely compatible with everything EXCLUDING RNG Dynamic Guards or Varied Guards
Tested compatible with aMidianborn Book of Silence, Guard Dialogue Overhaul, Open Face Guards, Diverse Guards, Friendly Guards, Immersive Weapons and Heavy Armoury

Credits:
lumps for his pauldrons mesh
Natterforme for select Scarves of Skyrim