War Zone Octarius Book 1: Rising Tide is coming soon. We've seen what it will have for Tyranids. But it also has stuff for Imperial Guard. Check out their new rules coming for 40k, including the return of the Whiteshields.
From the article:
The Octarian War calls upon the Cadians to defend the Imperium once again, and they’ll be fighting harder than ever thanks to the new Codex Supplement: Cadia found in the upcoming War Zone Octarius Book 1: Rising Tide.
This new campaign book follows an escalating conflict that erupted earlier this year with the release of the fantastic new edition of Kill Team. Matters have only gotten worse as the Imperium struggles to contain a war that its own agents precipitated – and Hive Fleet Leviathan devises powerful adaptations and esoteric Synaptic Link abilities to lay low its prey.