Port Battle/Havana Harbor
The primary feature of this map is the narrow channels near the fort, in the center of the map. Attackers arriving at positions 1 and 2 are funneled into these small areas, where there’s little room to maneuver. The eastern approach at position 3 is more open and accessible, and avoids the guns of the fortress, but is a longer route overall, giving defenders more time to prepare for the attack.
Defender position is largely irrelevant in Havana Harbor, because of the restricted avenues of approach. If the defenders are certain the attackers will come through the channel, they can quickly form up a defensive line at position 1 or 2, but even if all the attackers come from the east, the defenders can still move to intercept them easily.