Next Patch or Add-on:
Bring back ability to sell/give military units. That way if you were more advanced than other civs, you could start selling advanced units to warring parties.
Imagine two civs going at it with knights and longbowmen, when suddenly one side acquires infantry and tanks! Then, to keep things even, you sell the same equipment to the other side. You could even position "military advisors" to observe the festivities (get Right of Passage agreements with both sides.)
Bring back ability to sell/give military units. That way if you were more advanced than other civs, you could start selling advanced units to warring parties.
Imagine two civs going at it with knights and longbowmen, when suddenly one side acquires infantry and tanks! Then, to keep things even, you sell the same equipment to the other side. You could even position "military advisors" to observe the festivities (get Right of Passage agreements with both sides.)