I've never used the "convert convoys to transports" event so at the end of my last game I gave it a shot just to see what happens. It converts 50 convoys into one transport along with a $200 cost. Fair enough. Except of course that if you convert a transport into convoys you only get 10 convoys.
Now as the transport you get is of the latest model researched I kind of expected some sort of loss but 80% seems a bit steep!
Now as the transport you get is of the latest model researched I kind of expected some sort of loss but 80% seems a bit steep!