Ghost Walkers

The Ghost Walkers Chapter were founded in the later years of the 35th millennium during the 21st Founding, the "Cursed Founding", all though they were originally formed millennia before hand. Unlike the rest of the chapters of the Adeptus Astartes, the Ghost Walkers are more like a chaos warband. Long before their reorganisation and founding as an actual chapter and up until the start of the Indomitus Crusade, they were deemed renegades and heretics, with the only difference between them and any other chaos warband being that they served the Emperor. The main similarity between them and the traitor warbands were that of heritage. All though only a fraction of what it used to be, the Ghost Walkers still boast incredible numbers, with the sons of six primarchs in their ranks.
Indeed, this multitude of brotherhoods serves as a slight problem, in both egotistical and logistical senses. This problem however, was made unimportant from the start, as the laws of the Ghost Walkers were set out and written. This means that the surviving sons have a guide, and the rules of which they follow are fair for all.
Due to such high numbers but an unequal consistency among the different divisions that make up the Ghost Walkers, there is a high death rate for some and less combat for others. As a result, the Ghost Walkers have a high influx of new brothers for some divisions and others having a new one every half a century due to them having to adapt and fight a different type of warfare, one that is more acquitted to the likes of the Deathwatch.
What the Ghost Walkers lack in all around numerical strength and cohesion, however, is more than compensated for an ability to take on any army and any scenario presented to them, and halls full of banners and relics depicting an endless number of victories. They have never once denied a request for assistance by Imperial forces, and have won the admiration, respect and trust of Chapter Masters and Planetary Governors alike for their selfless heroism. Their ability to send a force to take on any mission is incomparable, and it is a rarity in which they find themselves unable to aid. May it be for an all-out assault, a great siege or a special mission requiring very few but the finest of battle-brothers, the Ghost Walkers are prepared.