Galactic Marines Books in Order

In 2040, discoveries in a ruined Martian city threaten accepted accounts of humanity's origins. A small Marine expedition protects American scientists and interests as rival powers prepare to fight over secrets buried on the Red Planet.

War between the United Nations and an American-led alliance escalates as alien secrets emerge on the Moon. Those discoveries point to a threat beyond the solar system, while the UN considers a devastating way to end hostilities.

In 2067, an ancient artificial intelligence beneath Europa's ice could explain humanity's origins. Outnumbered American Marines defend it against a Chinese assault while rival nations compete for alien technology and warnings of greater danger emerge.

A research mission discovers humans enslaved on the distant planet Ishtar by descendants of an ancient alien empire. Earth's Marines undertake a ten-year voyage to free the captives, facing rulers determined to reclaim their former power.

Marines return to an Earth aged by twenty-one years during their interstellar expedition. As they prepare for further service, a detachment disappears during a mission through an ancient wormhole near Sirius, revealing a new threat.

Alien forces bombard Earth with asteroids while its defenders are scattered across the galaxy. As leaders consider retreat, General Garroway and his Marines prepare a counterattack using new technology and help from an unexpected alien ally.

Marines discover the hidden homeworld of the Xul after years of interstellar warfare. Their chance to strike a decisive blow faces opposition from an Earth that has forgotten the danger, complicating an already perilous military mission.

United Star Marines follow the trail of a vanished transport through an unexplored stargate. Their journey into an unknown galaxy may offer a way to defeat the Xul, an ancient alien power that nearly destroyed humanity.

General Garroway and his Marines awaken after centuries of suspended sleep to face a renewed galactic crisis. Political leaders need their fighting skills, but the soldiers must navigate a changed society and competing ambitions for power.