JFD's Civilizations - Prussia (Frederick) for Vox Populi (v 9)

Army with a State (UA)

All specialists produce Great General Points and increase Production of Land Units when worked. +100% XP for Land Units when built. Melee and Gunpowder Units receive the Prussian Discipline Promotion.

Kriegsschule (UB) (replaces Military Academy)

• +2 Science and Culture (instead of 1 Science).
• +15 additional XP (+40 instead of +25).
  
• 1 scientist specialist slot.
• Costs less Production (1000 instead of 1250).
• Unlocks earlier at Metallurgy (or Fortification with Enlightenment Era).
  
• All Gun and Melee units from the city gain +10% Combat Strength per adjacent Gun or Melee unit and +1 Movement.

Gardekorps (UU) (replaces Fusilier, or Line Infantry with Enlightenment Era)

• +4 Combat Strength.
  
• Stalwart (+35% Combat Strength when defending).

Additional mod compatibility

• Community Events
• Events & Decisions for CBP
• Enlightenment Era for Vox Populi
• 3UC/4UC for VP
• CIV-Linked Great Generals

Other information
To install, extract to C:\Users\[your username]\Sid Meier's Civilization 5\MODS.
More details in the thread.

Credits

• JFD: Author.
• Janboruta: Art (Civ Icon, Leader Icon, Unique Component Icons, Leaderscene, Map).
• bernie14: Graphics (UUs).
• Creative Assembly: Music (Peace).
• Andrea Waldetoft: Music (War).
• LeeS: Lua Utilities (Unit Spawn Handler).
  
• HungryForFood: Kriegsschule icon (edited from this).
• Asterix Rage: Promotion icons.
• toxyy: CIV-linked Great Generals compatibility.

Disclaimer
I am not the author of the original mod.