The Age of Conquest/Units

I will soon proceed to the Indians of America, right now, I want to finish units in Europe, then podkorektirovat artileriyu, buildings, and then proceed to the Indians, their buildings, neutral settlements, and only after the art texture, proceed to the assembly, though I do not quite understand in programming European units will consist of, barrack Spearman, arquebusiers, crossbowman, musketeer, this 17th century the fortress Fusilier, musketeer, pikimen, and general and it is also the standard-bearer
==Suggested tech trees:==
Natives
Drill square => Barracks
*Slingers/Javelineers
*Spearmen
*Bowmen
*?????
Stable/Nobles' Court?????
*?????
*?????
====Anchorage====
*Outriggers, War Canoes
Siege factory
*Battering Ram????
*Mortar
*Wooden Cannon
===Western===
Peasant Commune/Small House
*Peasant Levy
Drill square => Barracks
*Arquebusiers => Musketeers [1]
*Pikemen
*Arbalest Infantry (replaced by Longbowmen for English, consumed by Musketeers)
Town Watch
*Scout Cavalry
*Explorer
*Levy Crossbowmen
Command Centre (can attack enemies)
*Crossbow Cavalry
*Man-at-Arms
*Halberdiers
Marine Cantonment
*Fire Vessel
*Carrack => Galleon => Heavy Frigate
*Caravel, Yacht
*Galley => Galiote à Bombe [France only] => Bomb Ketch
*Frigate
*Fishing Busse
Siege Factory
*Culverin => Cannon
*Bombard, consumed by Cannon, Mortar
*Flying Artillery (later only, unique to France, Germany)