So yes, now you can combine spacemarine armies. Unfortunately you are not allowed to mix-and-match with units from different Codices any which way. The different books are tuned somewhat to have different strengths and weaknesses. Keeping this in consideration, can you mix armies in Warhammer 40k?
because warhammer 40k IS the tabletop game. Also, yes you can, Maybe not in a Tournament, or atleast not with the freedom youd want, but as long as all Units share atleast a keyword, then by the rules of the current Edition,yes you can. Guardsmen have Imperium of man, so do the spacemarines, and the Knights.
Likewise, how many Space Marines are there? According to the Warhammer 40k Wiki, there are about 1000 chapters of Space Marines. At roughly 1000 Space Marines each, there would be around a million Space Marines in the Imperium at any given time. There are chapters that do not adhere strictly to the Codex Astartes.
Accordingly, are Space Marines and Imperial Guard allies?
The Space Marines are not, and never will be, under the command of the Imperial Guard. Any General in the Imperial Guard is glad to have a company of Space Marines on his side, but even the General knows the SM will do what they want, when they want.
Who can Chaos Space Marines ally with?
7: Fight the Long War. Thanks to the Heretic Astartes keyword, Chaos Space Marines make great natural allies to a Death Guard army.
Related Question Answers
What is battle forged?
Battle-forged armies will be familiar to Warhammer 40,000 players today – it basically means that all the models in your army are part of a Detachment or Formation. These are flexible enough that all of your current forces can be fit into them to form a Battle-forged army. What are the armies in Warhammer 40k?
Armies of the Imperium - Adepta Sororitas - 21.
- Adeptus Custodes - 20.
- Adeptus Mechanicus - 25.
- Astra Militarum - 66.
- Black Templars - 95.
- Blood Angels - 115.
- Dark Angels - 107.
- Deathwatch - 43.
What are the factions of Warhammer 40k?
Explore the Factions - STEP 1: choose a side.
- STEP 2: CHOOSE A FACTION. Space Marines. Space Marines. Blood Angels. Dark Angels. Space Wolves. Grey Knights. Deathwatch. Astra Militarum. Adepta Sororitas. Adeptus Custodes. Sisters of Silence. Adeptus Mechanicus. Imperial Agents. Imperial Knights.
Do Space Marines respect Guardsmen?
As for your average guardsmans reactions towards Space Marines, it differs greatly. Generally, they're treated with respect, being mankinds most capable and vigilant defenders. Some just see them as non-human tools, as weapons intended to fight their battles. Can Imperial Guard become Space Marines?
Yes, there is at least one known case of a Guardsman being recruited by a Space Marine unit (Blood Ravens) and being augmented. There is a recorded instance of an Imperial Guardsman becoming a Space Marine of the Blood Ravens! How many guardsmen does it take to kill a Space Marine?
I would even argue that someone like Kaldor Draigo could cut through entire regiments with ease. But a simple yardstick is that an unarmoured space marine is worth 10 guardsmen , whilst an fully armed and armoured marine is worth a hundred. How many troops are in an Imperial Guard regiment?
750,000
Are Space Marine scouts any good?
Space Marines are in a really bad spot competitively. All of their units are overpriced and very few of them stand out as particularly good. Scouts are the cheapest troop option which makes them the best pick, on top of that they are able to deploy outside of the deployment zone. Can Space Marines reproduce?
Space Marine DNA is just too different to normal human DNA, so there is no chance to reproduce the natural way with human woman. The only loyalist marines that DO have occasional boink are Space Wolves, who drunk with their mead sometimes take Fenrisian women (because women form any other world would be too fragile). Do Space Marines need to sleep?
They do, but space marines can go long periods of time without sleep. The Catalepsean Node gene seed organ can shut off parts of the brain, allowing a marine to "rest" while remaining alert. But it can't replace sleep. Do Space Marines die of old age?
The average age of a Space Marine who is dutiful to the Emperor and repelling enemies of the Empire is about 300-350 years. No Space Marine has ever been reported of dying of old age and all of them expect to die in battle against enemies of the Empire. Can Chaos Space Marines die?
They die, same as you & I. There are, of course, exceptions (Kharn & Lucius being two), but in the vast majority of cases their sould simply dissipates from the material containment into the Aetherium to merge with the spirit of his god. Who is the oldest space marine?
Commander Dante is one of the most legendary Space Marine Commanders in the Imperium. He has led the Blood Angels Chapter for over 1,000 years and it is widely believed that he is the oldest living Space Marine. How fast can space marines run?
about 21Km/h
What can kill a Space Marine?
A SPACE MARINE! A power sword, a chain sword, a melta, krak grenades, a good pistol shot to the head, etc. Tau weaponry has proven effective-- so railguns, pulse rifles (I imagine them as being similar to Star Wars blasters), and the like. How strong is a Space Marine?
As mentioned in the 6E rulebook, a Space Marine, "provided he does not fall to battle, can easily live two to three times longer than a normal man, and sometimes far longer". Do Space Marines take off their armor?
A Space Marine can remove their armor. All of the listed armors above with the exception of the Dreadnought are all able be worn by Space Marines after their final gene-seed technologies are installed. It is the final transformation of Space Marine too injured to recover but unwilling to stop fighting. 
