For sake of better game balance, I decided to add "Trireme" flag to all transport coasters such as Trireme, Aak, Barges,
which can transport regular troops along sea and rivers. Now they are restricted to move along safe coast.
The purpose is, that troops can be unloaded from such ship instantly and deployed in same turn, if this ship is on river and tile is suitable for land unit (BTW, rivers are not native for most of land units in this ruleset).
Such tactics make a huge threat of sudden inland attacks far before Marines, thus "Trireme" restriction help to control movement of enemy barges along coast (it is easier to spot them, and one ship can block them, even if there is wide shallow ocean nearby).
Navy coasters, such as Galley, Monitor or Patrol Boat have no "Trireme" restriction, but their transport capability is narrowed to Turrets and Small Land, thus they are less threat as instantly deployed cavalry or bombarding artillery.
Another change is to add special Mahout Barrack improvement, which make add vv (veteran) level to Elephants and require Jainism tech and presence of Jungle (Elephant resource, if present, add 2 trade point here).
Elephants are ancient tanks here, because their HP=20 (for comparison, Horsemen HP=12, Pikemen HP=14, Knight HP=16),
and additionally Pikemen have no defense bonus against them, thus Elephants can't be improved in regular Stable Barracks because it would be overpowered.
Currently there is following Barrack system adding vv level:
- Barracks I, Barracks II: Melee Infantry, Gunpowder Infantry
- Stables Barrack: Horse Cavalry (and Chariot in case of Despotism)
- Mahout Barracks: Elephants
- Workshop Barracks: Wheeled Units, Big Land, Mech. Inf.