In this cult fan favorite, it's the year 2063. After 150 years of deep space exploration, the people of Earth feel certain they are alone in the universe. Then word comes that two Earth outposts light-years away from home have been brutally attacked by an advanced alien civilization. Now the new young recruits of the United States Marine Corps Space Aviator Calvary are heading for the front lines of space in the toughest battle the world has even faced.