The chess-like board is mostly water, with 'islands' in the middle. Each player has a homeland in a corner of the board with 3 ports.Units are naval vessels, aircraft, air/naval bases and construction units.Players purchase units with money and fight it out their military units to become the richest player by the end of the game.A full set includes:4 fact sheets (purchase prices, move/fire/range info) Money (play money) Equipment pieces for 4 countries 4 Flag markers Generic air & naval base markers and damage markers 2 air-range measures 4 diceI'm not sure how many of these were produced mine is an original, mimeographed in a printed folder. - BoardGameGeek