From the back of the Book:
SAIPAN is a complete adventure for the game GODLIKE: Superhero Roleplaying in a World on Fire, 1939-1946.
It chronicles the entire battle for Saipan - the beginning of the end of the Pacific war - as seen by marine commandos, the "Devil's Own," whose amazing powers thrust them into the bitterest action of a deadly campaign.
The players battle stealthy patrols, cunning snipers, devastating tanks and artillery, and the Gaki, Japanese soldiers who have manifested strange and dangerous Talents of their own...