The Realm of Chaos is one of the strangest and most feared places in the Warhammer world. It is constantly changing from forces of Chaos that inhabit it. No mere mortal dare walk into the Northern Wastes, where the Realm of Chaos is, alone or unprepared or they will face certain death. If they go in accompanied by the right forces, they might have a chace to get past the Troll Country where the Realm of Chaos farthest extends to. The Realm of Chaos was formed by a interdimensional gateway created by The Old Ones. When this gate collapsed, the Realm of Chaos was created. This led to the fall of the Old Ones and the rise of the cultures that exsist now. Ever since then Chaos has been attacking this dimension trying to take over the world. So far they have been unsuccessful. But, no ye now that the time of mortals has come to an end.
If you are a Chaos player(who has the new rules) and are looking for some tips then look no further. The first most obvious stategy is to get into hand-to-hand combat as quickly as possible. This is why Chaos Knights are so good. They are fast moving Chaos Warriors who can have a 1+ armour save. A second strategy that I use alot is, since Chaos Warriors fall so easily to archery, I usually buy some Beastmen Bestigors or Gors and put them in front of the Chaos Warriors so that the Beastmen adsorb all of the arrows with their 2 wounds a piece. Finally, use Beastmen Warbands, their stats may not be as good as the Daemons or the Chaos Warriors, but they are much cheaper in cost and have 2 wounds apiece. Therefore you can get 5 Bestigors for 1 Chaos Knight with a 1+ save.
If you are not a Chaos player and are going to play one then here are some tips for you. First of all, archery. Archery is a Chaos Armies worst nightmare. Usually it will rip right through our units and cause severe damage. If you could stay as far away as possible from the Chaos army, and peg them with archery through out the whole game, you will have a very high chance of winning. Secondly, avoid hand-to-hand combat with Chaos. they are the strongest fighters in the game. They will rip apart any unit that they get into hand-to-hand combat with. Also watch out for Chaos Knights. They don't look so bad, but they cause massive amounts of damage in hand-to-hand combat. Also they can have a 1+ save which can get very annoying.