During the Horus Heresy the Dark Angels experienced turncoats from within the Legion a betrayal that only select members within the Dark Angels know. They have spent much of their time hunting their "Fallen" brethren in an attempt to keep this secret.
The Dark Angels are separated into companies just as other Space Marine Chapters. The 1st Company are known as the Deathwing they are the ultimate warriors against the Fallen. In their bone colored armor they take to the field to eliminate forces containing and lead by the Fallen. The Ravenwing make up the 2nd company. Clad in their original Legion colors of black armor on bikes and land speeders they are a highly mobile strike force that provides recon of locations the Fallen forces gather.Then there are the rest of the companies clad in dark green armor. The secret of the Fallen grows scarce amongst these other companies.
I have decided to start with the 1st Company. The Deathwing: Here is one squad.
I have 16 more Terminators that have been base coated, washed, and highlighted and working on some Dreadnaughts and a Land Raider Crusader that I am working on also.