Last Imperial Civil War (Premysloides Dynasty)

Background
Second Pan-European War ended by crushing defeat of Saint Atlantis, as well as collapse of Roman Empire in to Fourth Imperial Civil War. This war was direct consequence of nuclear attack against Constantinople and massive army mutinies ignited by ambitious military commanders trying to conquer power in weakened Empire.

Two sides consolidated in early civil war. Valerians and Arcadians.

Valerians
Loyalists of Emperor Valerianus. Forces loyal to Imperial Government and Roman Empire.

Arcadians
Loyalists of mutinied Supreme Stratégos Arcadius, various groups, rebels and military leaders, part of imperial political representants, especially from Citizen Party seeking to dissolve Roman Empire.

War
In first year, situation for Valerians was critical, as imperial territory was ruined and Valerians had problems to identify loyal forces and Arcadian rebels among massive imperial army occupying large territories of former Saint Atlantis. Not mention that Saint Atlantis de facto survived in northern half of France and also collapsed in to bloody civil war among various military rebels, theocratic rulers, peasant rebels and other elements.

Very soon Arcadius reached large support among artillery forces officer corps and gathered massive artillery corps, while Valerian loyalists had strong position among armoured forces commanders.