- Added sea zones, routes, ports, fleet movement, blockade, and supply effects.
- Ship types and readiness affect naval combat and bombardment.
- Choose army targets, formation cities, and added unit types.
- Added the 1598 Ming fleet and historical battle zones.
- AI targets nearby enemies; Ming crosses Joseon to attack Japan; key Japanese cities grow defenders.
- Maps show 3 armies/city plus overflow; lists show total troops.
- Added safe-area layouts.