Tanith starting their charge on chaos positions in a city battle setting.
This one is actually inspired by my IG army colour scheme. Im kinda playin with the idea in my army that the Tanith first and only actually get the right to colonize a planet as their new homeworld.
And these fellas are the New Tanith 1st.
As the planet prospered they of course started to train their own troops for the Imperial Guard and kept up the traditions of the original Tanith first and only.
Or you can imagine these guys are some tanith first and only grunts in one of the hundreds of firefights they had to take part in in the sabbat worlds crusade.
Take your pick!