Space Alien War

Korri Fontenot left family behind on Earth a century ago to fight in a war that broke her body and her mind. Now, her great-granddaughter, Jackie, has followed in her footsteps. First as a Marine and then as a mercenary outlaw, Jackie has made the mistake of breaking into a secret corporate lab and stealing an ancient alien artifact. Dark forces want the artifact back.

King Agesilaus and his Terran Legions have won their first victory against the Median Empire. Despite sustaining heavy casualties, they established a vital foothold in enemy territory. Yet the Empire is far from defeated, and they begin to ready their forces for a counterattack. In a display of overwhelming power, they throw fleets of ships and armies of levies and mercenaries against the Terrans. The outcome is uncertain, until Agesilaus and his generals uncover a stunning secret

At least they're primates. That was Commander Riniana Tiana's first thought when she saw the primitive - but sentient - humans of Earth. She should be able to fit in...After all, her own species is primatal too. And she'd only come here to save them from invasion...But humans don't have tails. And most of them seem extremely jealous of hers! Using the curious custom of clothing, Tiana hides her tail, passes for human and pursues the alien invaders in a desperate struggle to save an ungrateful planet.