So, here is a Brother Veteran Sergeant of the Vulpines Errant Chapter. It's my personal Chapter of Space Marines. I created them because I was bored, and I like 40k, so I gave myself a project.

-Chapter Data-
Vulpines Errant
Chapter Number: 872
Warcry: "Vulpes redimita in igne, debellandum hereticus" (The fox wreathed in fire, vanquish the heretic)
Founding: Unknown
Strength: 1,207 Battle Brothers, many other Specialist Marines
Successor Chapters: None
Successors of: Imperial Fists
Primarch: Rogal Dorn
Chapter Homeworld: Victus Secundus
Allegiance: Imperium of Man
Colours: Yellow and Red

Brief Summary:
Successors of the Gene-Seed of Rogal Dorn, the Vulpines Errant are a younger Chapter of Astartes. Founded in a recent, but unknown Founding, the Vulpines are shown as expert Siege Masters and Fortress Builders. They are a mostly Codex Compliant Chapter, with some noted deviations from the Codex Astartes. The most notable is that there are 12 Companies of Battle-Brothers. There is no specified Scout Company, the scouts making up the 10th Squad of every Company. Also is the unusually high number of Techmarines and Apothecaries in each Company. The reason for this is unknown, however the Techmarines have been seen as an irreplaceable asset for siege warfare. Most of the Iconography of the Vulpines is animal oriented, specifically of the Vulpes Vulpes (Red Fox). The animal is seen as sacred to them and the Chapter has managed to retain a number of the very few Terran Red Foxes left to the galaxy. A mutation in the gene-seed has seen the growth of fangs in the Battle-Brothers. Some have gone as far to grow fangs, and in some cases the ears of a brother become pointed. This has caused speculation that their gene-seed may come from the Space Wolves, though this is usually disregarded as rumour.

LUNA COMPANY

The Fourth Company is the Honour Company alongside the Veteran First Company. The Brothers of this Battle Company wear black and white plate. Additionally, the badge on the left shoulder guard displays the Chapter Badge of the Ultramarines with the numeral X (10) inside the badge, and the Company numeral, IV (4) underneath. The right shoulder guard displays the Chapter badge in white with a white laurel painted around it. This is to honour the mutual sacrifice of the Vulpines Errant Fourth Company and the 9 squads of the Ultramarines Tenth Company fighting the forces of the Iron Warriors on the doomed planet of Acheron 6, in the Segmentum Obscurous. The battle saw the planets inhabitants saved from the indelicate mercies of the forces of Chaos, but also saw both companies slaughtered to a man, robbing the Vulpines Errant of an entire Battle Company, and the Ultramarines of all but ten of their Scouts.