Continuing on from Rautio's guide to the mission paths, I've done one for the Salamanders and Dark Angels campiagns. I also included the Imperial Fists with the Avenging Fist mission added which was missing from the original.
The campiagns included are:
Shield of Retribution
Forge of Heroes
Bringer of Sorrow

I completed the campaigns on normal, although that shouldn't make any difference to the mission flow. I've included some of the optional missions where if you select to do that particular optional mission you will be locked into the following path. Clear as mud?

With the Salamders campaign, the three missions Wisdom of our Forebears, The Words of our Father and Secrets of the Past all have to be completed before advancing any further. It dosn't matter which order you do those three in.
It's the same with Overload and Overwhelm, and Power and Responsibility on the Dark Angels campaign.

I've stuck to the original colour code for the difficulty.
Green - Normal
Blue - Hard
Orange - Very Hard
Red - Impossible
Plus purple for the optional missions.

If anyone notices any discrepancies please let me know and I'll get it sorted.