Union Petharian War 3878 – 3883 OTT
This intense war was fought entirely in the Andromeda Galaxy and lasted from 3878 OTT to 3883 OTT.
It started after a Petharian army dropped on a Blue / Union colony (Akasia planet ) and ended with the defeat of the Arcane order at the Battle of Pakattohr .
The war casualties on Union side were high. Over 4 million Marines perished. Union marines suffered the greatest losses, but also secured the victory.