Jason Wander Series by Robert Buettner

Brutally attacked by projectiles launched against Earth from Jupiter's moon, Ganymede, humankind gambles on a single desperate counterstrike, sending a scavenged spacecraft with Vietnam-era weapons and foot soldiers--all orphans whom no one will miss like Jason Wander--to invade Ganymede and stop the alien attack. Original.

In 2043, field-promoted orphan Jason Wander has survived man's first space war, but surviving peace and politics seems to be even tougher. But when an enemy armada targets Earth itself for invasion, mankind must bet its existence on a suicide squad led by Jason.

In the years since the last Slug War, Jason's command style hasn't made him any friends in the Army. Now, in an effort to keep him out of trouble, the Army has sent Jason to the vast, Earth-orbiting resort called New Moon. At the core of this enormous space station is a starship, a relic from the last war. When a test run of the ship goes wrong, Jason, along with a handful of others, will be torn from orbit and thrust into space... moreIn the years since the last Slug War, Jason's command style hasn't made him any friends in the Army. Now, in an effort to keep him out of trouble, the Army has sent Jason to the vast, Earth-orbiting resort called New Moon. At the core of this enormous space station is a starship, a relic from the last war. When a test run of the ship goes wrong, Jason, along with a handful of others, will be torn from orbit and thrust into space. Now, stranded on an alien planet, Jason realizes that not only are his friends are looking to him for rescue, but an entire planet sees him as their only hope. less

The story of one man's life from enlistment to conflict on alien soil, Orphan's Alliance continues Robert Buettner's action-packed military science fiction series.Jason's army defeated the slugs on Bren and now, fifteen years later, he finds himself once more commanding an invasion force. This time they must expel the Slugs from a small moon, where they decimated the human inhabitants... moreThe story of one man's life from enlistment to conflict on alien soil, Orphan's Alliance continues Robert Buettner's action-packed military science fiction series.Jason's army defeated the slugs on Bren and now, fifteen years later, he finds himself once more commanding an invasion force. This time they must expel the Slugs from a small moon, where they decimated the human inhabitants.And although Earth has finally begun to mobilise against the aggressors, a new and problematic faction has arisen. The totalitarian government of Tressel, a strategically-situated planet, is willing to defeat the Slugs at any cost - regardless of the human casualties.Unfortunately for Jason, his godson, Jude, is attracted to Tressel's total-war policies. As the struggle continues, Jason is not only fighting for the survival of the human race, but for his relationship with the only family he has left. less

Jason Wander is ready to lead the final charge into battle.After forty years of fighting the Slugs, mankind's reunited planets control the vital crossroad that secures their uneasy union. The doomsday weapon that can end the war, and the mighty fleet that will carry it to the Slug homeworld, lie within humanity's grasp.Since the Slug Blitz orphaned Jason Wander, he has risen from infantry recruit to commander of Earth's garrisons on the emerging allied planets... moreJason Wander is ready to lead the final charge into battle.After forty years of fighting the Slugs, mankind's reunited planets control the vital crossroad that secures their uneasy union. The doomsday weapon that can end the war, and the mighty fleet that will carry it to the Slug homeworld, lie within humanity's grasp.Since the Slug Blitz orphaned Jason Wander, he has risen from infantry recruit to commander of Earth's garrisons on the emerging allied planets. But four decades of service have cost Jason not just his friends and family, but his innocence. When an enemy counter stroke threatens to reverse the war and destroy mankind, Jason must finally confront not only his lifelong alien enemy, but the reality of what a lifetime as a soldier has made him. less