Way back in 2019, we hosted a poll in our Facebook Group and here on the blog to determine the Top 10 Military Sci-Fi Books and Series of All Time. In the intervening years, The Discover Sci-Fi community has grown by leaps and bounds, add to which there have been hundreds more military sci-fi books released. As such, we figured it was a great time to revisit and see if the titles that came out on top five years ago are still the fan favorites of today.

So over the last two weeks we once again polled our audience and received thousands of votes between the main poll here on the blog, and our supplementary poll over in the Discover Sci-Fi Facebook group.

Today, we are pleased to unveil the top 10 military sci-fi books and series as decided by your votes, ordered from 10 to 1. You may (or may not) be surprised to see there were indeed some changes, with half of the titles from the original list being replaced. 

Scroll on to check it out and please feel free to comment at the bottom of this post (or in our Facebook group) to let us know if you agree (or not!)

10. Dorsai! by Gordon R. Dickson

Donal Graeme set out to re-shape the galaxy, but first he must tear it apart. Donal Graeme, Dorsai of the Dorsai, was the final link in a long genetic train, the ultimate soldier, whose breadth of vision made him a master of space war and strategy - and something even greater. He was the focus of centuries of evolution, the culmination of planned development, and through him a new force made itself felt. Dorsai were renowned throughout the galaxy as the finest soldiers ever born, trained from birth to fight and win, no matter what the odds. With Donal at their head they embarked upon the final, impossible venture: they set out to unify the splintered worlds of Mankind.

Read Dorsai! here on Amazon. 

9. Hammer's Slammers by David Drake

With a veteran's eye for the harsh and gritty details of war, David Drake depicts a futuristic analog of tank combat in his Hammer's Slammers fiction. The Slammers are neither cartoon heroes nor propaganda villains; rather they are competent professionals engaged in a deadly business. The inevitable conflicts between policy, necessity, and human nature make Drake's Slammers fiction instantly identifiable and utterly compelling. This is the first of a three volume set presenting for the first time the entire genre-defining Slammers series in a uniform trade paperback set, with new introductions by major SF figures and new afterwords by David Drake. Each volume will also include a Slammers story not collected in previous Slammer's books.

Grab Hammer's Slammers here on Amazon.

8. The Lost Fleet by Jack Campbell

The Alliance has been fighting the Syndics for a century—and losing badly. Now its fleet is crippled and stranded in enemy territory. Their only hope is a man who's emerged from a century-long hibernation to find he has been heroically idealized beyond belief....

Captain John “Black Jack” Geary’s exploits are known to every schoolchild. Revered for his heroic “last stand” in the early days of the war, he was presumed dead. But a century later, Geary miraculously returns and reluctantly takes command of the Alliance Fleet as it faces annihilation by the Syndics.

Appalled by the hero-worship around him, Geary is nevertheless a man who will do his duty. And he knows that bringing the stolen Syndic hypernet key safely home is the Alliance’s one chance to win the war. But to do that, Geary will have to live up to the impossibly heroic “Black Jack” legend....

Get your copy of The Lost Fleet: Dauntless here on Amazon. Also available on audiobook.

7. The Mote in God's Eye by Larry Niven and Jerry Pournelle

Read The Mote in God's Eye here on Amazon. Also available on audiobook.

6. Dune by Frank Herbert

Frank Herbert’s classic masterpiece—a triumph of the imagination and one of the bestselling science fiction novels of all time.

Set on the desert planet Arrakis, Dune is the story of Paul Atreides—who would become known as Muad'Dib—and of a great family's ambition to bring to fruition mankind's most ancient and unattainable dream.

A stunning blend of adventure and mysticism, environmentalism and politics, Dune won the first Nebula Award, shared the Hugo Award, and formed the basis of what is undoubtedly the grandest epic in science fiction.

 Grab Dune here on Amazon. Also available on audiobook.

5. The Forever War by Joe Haldeman  

Winner of the Hugo and Nebula Awards: A futuristic masterpiece, “perhaps the most important war novel written since Vietnam” (Junot Díaz).
 
In this novel, a landmark of science fiction that began as an MFA thesis for the Iowa Writers’ Workshop and went on to become an award-winning classic—inspiring a play, a graphic novel, and most recently an in-development film—man has taken to the stars, and soldiers fighting the wars of the future return to Earth forever alienated from their home.
 
Conscripted into service for the United Nations Exploratory Force, a highly trained unit built for revenge, physics student William Mandella fights for his planet light years away against the alien force known as the Taurans. “Mandella’s attempt to survive and remain human in the face of an absurd, almost endless war is harrowing, hilarious, heartbreaking, and true,” says Pulitzer Prize–winning novelist Junot Díaz—and because of the relative passage of time when one travels at incredibly high speed, the Earth Mandella returns to after his two-year experience has progressed decades and is foreign to him in disturbing ways.
 
Based in part on the author’s experiences in Vietnam, The Forever War is regarded as one of the greatest military science fiction novels ever written, capturing the alienation that servicemen and women experience even now upon returning home from battle. It shines a light not only on the culture of the 1970s in which it was written, but also on our potential future. “To say that The Forever War is the best science fiction war novel ever written is to damn it with faint praise. It is . . . as fine and woundingly genuine a war story as any I’ve read”

Get your copy of The Forever War here on Amazon. Also available on audiobook.

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4. Old Man's War by John Scalzi 

John Perry did two things on his 75th birthday. First he visited his wife's grave. Then he joined the army.

The good news is that humanity finally made it into interstellar space. The bad news is that planets fit to live on are scarce-and aliens willing to fight for them are common. The universe, it turns out, is a hostile place.

So: we fight. To defend Earth (a target for our new enemies, should we let them get close enough) and to stake our own claim to planetary real estate. Far from Earth, the war has gone on for decades: brutal, bloody, unyielding.

Earth itself is a backwater. The bulk of humanity's resources are in the hands of the Colonial Defense Force, which shields the home planet from too much knowledge of the situation. What's known to everybody is that when you reach retirement age, you can join the CDF. They don't want young people; they want people who carry the knowledge and skills of decades of living. You'll be taken off Earth and never allowed to return. You'll serve your time at the front. And if you survive, you'll be given a generous homestead stake of your own, on one of our hard-won colony planets.

John Perry is taking that deal. He has only the vaguest idea what to expect. Because the actual fight, light-years from home, is far, far harder than he can imagine-and what he will become is far stranger.

Grab Old Man's War here on Amazon. Also available on audiobook.

3. Ender's Game bu Orson Scott Card

In order to develop a secure defense against a hostile alien race's next attack, government agencies breed child geniuses and train them as soldiers. A brilliant young boy, Andrew "Ender" Wiggin lives with his kind but distant parents, his sadistic brother Peter, and the person he loves more than anyone else, his sister Valentine. Peter and Valentine were candidates for the soldier-training program but didn't make the cut—young Ender is the Wiggin drafted to the orbiting Battle School for rigorous military training.

Ender's skills make him a leader in school and respected in the Battle Room, where children play at mock battles in zero gravity. Yet growing up in an artificial community of young soldiers Ender suffers greatly from isolation, rivalry from his peers, pressure from the adult teachers, and an unsettling fear of the alien invaders. His psychological battles include loneliness, fear that he is becoming like the cruel brother he remembers, and fanning the flames of devotion to his beloved sister.

Is Ender the general Earth needs? But Ender is not the only result of the genetic experiments. The war with the Buggers has been raging for a hundred years, and the quest for the perfect general has been underway for almost as long. Ender's two older siblings are every bit as unusual as he is, but in very different ways. Between the three of them lie the abilities to remake a world. If, that is, the world survives.

Ender's Game is the winner of the 1985 Nebula Award for Best Novel and the 1986 Hugo Award for Best Novel.

Dive into Ender's Game here on Amazon. Also available on audiobook.

2. Honor Harrington Series by David Weber

Having made him look a fool, she's been exiled to Basilisk Station in disgrace and set up for ruin by a superior who hates her.

Her demoralized crew blames her for their ship's humiliating posting to an out-of-the-way picket station.

The aborigines of the system's only habitable planet are smoking homicide-inducing hallucinogens.

Parliament isn't sure it wants to keep the place; the major local industry is smuggling; the merchant cartels want her head; the star-conquering, so-called "Republic" of Haven is Up To Something; and Honor Harrington has a single, over-age light cruiser with an armament that doesn't work to police the entire star system.

But the people out to get her have made one mistake. They've made her mad.

Get your copy of book 1 in the Honor Harrington series, On Basilisk Station, here on Amazon. Also available on audiobook.

1. Starship Trooper by Robert A. Heinlein

In Robert A. Heinlein’s controversial Hugo Award-winning bestseller, a recruit of the future goes through the toughest boot camp in the Universe—and into battle against mankind’s most alarming enemy...

Johnnie Rico never really intended to join up—and definitely not the infantry. But now that he’s in the thick of it, trying to get through combat training harder than anything he could have imagined, he knows everyone in his unit is one bad move away from buying the farm in the interstellar war the Terran Federation is waging against the Arachnids.

Because everyone in the Mobile Infantry fights. And if the training doesn’t kill you, the Bugs are more than ready to finish the job...

Get your copy of Starship Troopers
here on Amazon. Also available on audiobook.

Now... Let's hear your opinions! Do you agree with the ranking here, or do you feel as though your most-loved military sci-fi book or series is missing or didn't place as high as you think it deserved to? Feel free to let us know in the comments here, or join us in our Discover Sci-Fi Facebook Group to chime in on this matter and on all else sci-fi related! 

*All book-related copy in this post was pulled from Amazon, Goodreads & Wikipedia, unless otherwise credited.