This Primarch was recently revived, he instructed Belisarius Cawl to begin work on the Primaris Space Marines shortly after the Horus Heresy and started the Indomitus Crusade.
Who is Roboute Guilliman
This Xenos species is known for its unending hunger and extreme swarming numbers, capable of overwhelming entire planets.
What are Tyranids
This Chaos legion is led by Abbadon the Despoiler.
What is the Black Legion
The largest military force of the Imperium of Mankind, most commonly referred to as the Imperial Guard
What is the Astra Militarum
The most powerful psyker in the galaxy, referred to as the "Master of Mankind" and currently placed on the Golden Throne on Holy Terra.
Who is the Emperor of Mankind
This Primarch devoted himself to Tzeentch shortly before the Horus Heresy after being manipulated by the forces of Chaos.
Who is Magnus the Red
This Xenos race is known to be extremely barbaric, as well as their very weird names for things.
What are Orks
The large gatherings of the forces of Chaos, led by Abbadon the Despoiler, with the intent to overwhelm the Imperium and ultimately destroy it. As of yet there have been thirteen of them.
What is Black Crusade
The military force that acts as the personal guard of the Emperor of Mankind, often considered overpowered in the tabletop game.
What are the Adeptus Custodes?
If an Imperial world is considered too far gone to be cleansed of whatever taint afflicts it, the Inquisition as well as Chapter Masters of Space Marines will order this action to be done.
What is an Exterminatus
This character is considered to be the oldest living space marine in service to the Emperor, excluding those who have been entombed in Dreadnoughts.
Who is Commander Dante
These Xenos are known to be virtually immortal and very technologically advanced.
What are Necrons
This legion has personal issues with the Space Wolves.
What is the Thousand Sons legion
The military force comprised entirely of women.
What is the Adepta Sororitas
Shortly after the Emperor of Mankind created the Primarchs and then lost the Primarchs and then created the Space Marines, He began this as a way of reuniting all of humanity to create a galaxy spanning empire.
What is the Great Crusade
This character has been alive and travelling the galaxy since before Humanity came into existence, quietly observing the galaxy, and is also a Necron.
Who is Szarekh
This Xenos race is known to be extremely technologically advanced, as well as very peaceful.
What are T'au
The fifth major Chaos god, often ignored due to a complete lack of content involving it.
Who is Malice
Most commonly reffered to as the Space Marines, these are the superhuman warrior-monks that are the foremost defenders of mankind.
What are the Adeptus Astartes
What is the Horus Heresy
This Sanguinary Priest sacrificed his life shortly before the Horus Heresy to save Sanguinius, because shortly before the Signus Campaign he was placed into a Golden Sarcophagus and communicated with a Blood Angel from the Indomitus Era and found out that Sanguinius had died at the hands of Horus.
Who is Meros
This Xenos species is why Slaanesh exists.
What are Aeldari
The technical term for the struggle between the Chaos gods.
What is the Great Game
The Space Marine legion that designed and built the Imperial Palace's defenses on Holy Terra before the Horus Heresy.
What are the Imperial Fists
This Xenos race fought an ancient war with another Xenos race, with said war being referred to as "The War in Heaven"
What are Necrons