Taken from the website:

EO is a complete naval, ground and air system simulating what might have happened had the invasion of Oahu been carried out immediately after the Pearl harbor raid. The game uses a double blind system for the naval aspects, as the US/Japanese carriers attempt to locate one another and destroy them. Each player is put in their historical counterpart's position just after the PH raid. The game uses two maps, a tactical map showing the island of Oahu for the ground battle, and a operational map for the naval and air operations.

Solitaire rules included.

Game includes:
280 counters
1 Operational map
1 Tactical map
Rulebook