Trader Mercenaries – Protect Traders Policy Card
Tired of protecting your Traders? The game does not even have a mechanic to let your military units to follow a Trader! Now for some costs, the Mercenaries will ensure that no one can disrupt your cash flow.
Add a new Military Policy Card "Trader Mercenaries" when you unlock Mercenaries Civic. While it is active, all your Traders are immune to plunder, but each active trade route costs -2 Gold per turn (a trade route without any Gold income may results in negative Gold income for you).