Any linked roads allow for fluid movement to occur between any of the linked provinces, that is, it only costs 1 movement point to move between any linked spaces. You cannot attack a province via road movement, thus all provincial units attacking another province must have previously occupied the adjacent province for a turn. Roads cannot be destroyed. The port allows for another sea passage link to be created with an province that already has a sea passage link. B. Get rid of the sea passages and divide the sea area into sections.
Provinces bordering on a particular sea area can create fleets.
A fleet may move 2 sea spaces and may carry 1 Army and 1 provincial force worth of units. Land Units cannot stay on a fleet at the end of a turn, but must be placed in a province before the end of the turn. Cost 2 and is a part of the build phase. Fleets can attack each other at strength 4 missile. Any units aboard a fleet that is hit are destroyed.