The Sail
Gives ship +1 movement, also allows workers to build the River Fleet improvement, which can only be built near rivers and which has a higher movement bonus than normal roads
Single Rider Reins
Improves horse archers. Apparently according to Civilopedia first one horseman was firing arrows, while a second horseman guided the horse of the first.
The Spoked Wheel
Metal Axle
The Spoked Wheel could perhaps give +1 road movement. Both techs could increase chariot strength. Currently in TAM chariots are weak units, and become quickly pretty useless already after Bronze Working. While AFAIK until the iron age and the rise of horseback riding, chariots were basically the tanks of ancient warfare, and should therefore be the strongest (and most expensive) units.
The Plow
gives some bonus to food production
The Sicklesword
Better than axes, worse than iron swords according to civilopedia.
Outrigger
Allows triremes
18 Foot Pike
According to civilopedia the "spearmen" the Macedonians used. While before spearmen were all-purpose infantry who used spears shorter than a man's length, with the advent of horseback riding, spearmen became more specialized, to eg counter cavalry. So this tech could give a more powerful spearmen unit with a bonus against mounted units.
Lorica Segmentata
Some Roman armour. Perhaps just an idea to rename the Heavy Armour tech.
Corvus
Allows a promotion for ships, which gives a movement penalty and reduces withdrawal chance, but which allows units on a ship to directly attack other ships. Romans used this tactic in the Punic Wars. IIRC FfH already has some code which would allow this.
For techs past 1 AD, there simply wasn't as much technological innovation then. Personally I'd just suggest to let the years pass slower in the early game, and faster in the late game.
Just say the word and I'm willing to rewrite the entire tech tree.
