This is what I have done so far, please comment and propose changes!

Citadel: Total War Tech Tree

Technology Advancement Buildings: (All names subject to change)

Gunpowder:

Gunsmith: Allows handgunners and other extremely early gun units. Low quality conscript troops for the most part, requires a low level barracks to train units, level two barracks.

Gunsmith’s Workshop: Allows Arquesbusiers and other slightly newer gunpowder units. With a high level barracks also allows Janissary Arquesbusiers and other unique units, level three and up.

Expert Gunsmith: Allows gun cavalry, including unique fire-before-charge units and such. Requires a fairly high level stable, three and up.

Ships: (A bit iffy on how to get this to work)

Port: Allows one trade fleet and the construction of transport type ships with weak combat attributes. Should we expand this further for more trade fleets or allow the maximum number of trade fleets from the beginning?

NEW SHIP LINE:

Shipwright: Allows the construction of the first real combat ships, still fairly small and not gunpowder armed.

Later Age Shipwright (Don’t know what to name it): Allows the use of larger non-gunpowder combat craft and with an Expert Cannon foundry allows the construction of the first gunpowder-armed ships.

Master Shipwright: Combined with a Master Cannon Foundry allows the construction of the largest most powerful gunpowder-armed ships.

I believe that is all of the technology building lines that we will need.

Normal buildings:

Barracks Line:

Militia Barracks: Trains militia soldiers of all (depending on quality some may require level 2) types.

Barracks: Trains regular soldiers and with a Gunsmith allows the training of handgunners.

City Barracks: Trains adept/professional soldiers and allows the training of more gunpowder units. Raises valor of militia?

Metropolis Barracks: Trains the best regular soldiers and increases the valor of Barracks soldiers. Allows the training of more unique/professional gunpowder units.

Royal Barracks: Trains the best and newest infantry. Allows Janissary Heavies and other exceptional and rare units. Increases the valor of City Barracks units.

Stable Line:

Stable: Allows the training of scout/router chasing level cavalry.

Cavalry Stable: Trains mainly non-lancer regular cavalry. Combat capable, but still light cavalry.

Regimental Stables: Trains professional medium cavalry and with an Expert Gunsmith trains some gunpowder-armed cavalry. Increases the valor of Stable units.

Noble’s Stables: Trains noble cavalry units and allows the training of more adept gunpowder cavalry. Increases the valor of Cavalry Stable units.

Royal Stables: Trains the best cavalry, knights and the best trained gunpowder armed/age cavalry. Increases the valor of Regimental Stables units.