Outlanders Vol 6

Kahm finds love with an earthling photographer and leads a rebellion against her father's empire. In Volume 6, the eight-million-ship space fleet of the Santovasku Empire has been dispatched to destroy Earth and the solar system in retaliation for Kahm's refusal to abandon her lover. But what the Santovasku don't know is that Earth's moon is an immense disguised battlestation built long ago by their rivals, the Yoma! Operation Phoenix has begun! Also included is the long out-of-print Outlanders #0, "The Key of Graciale."

Source: Anime News Network Encyclopedia