When I make a taskforce and select invade instead of just making the ships more aggressive I would like the game to ask which enemy port I want to attack. Then the taskforce should sail to that port and fight the ships stationed there and any ships in the area. There could also be a modifier for coastal defence/port canons so that the after you beat the defending fleet the attacks success or failure, amount of damage done to port (reduced tonnage), and amount of damage done to attacking taskforce is determined by size of port vs. power of attacking taskforce. If a port is totally destroyed it should become an occupied territory that the host nation cannot use for rest of the war unless they counter attack with their own taskforce and retake the port.