Layus War II

Layus War II, also known as the Second Layus War, was a intergalactic war that lasted from 4930 to 4945, though related conflicts began earlier. It involved the vast majority of Layus' inhabited planets—including all of the great powers—eventually forming two opposing military alliances: the Covenant and the Enclave. It was the most widespread war in history, and directly involved more than 890 quadrillion people from over 659 planets. In a state of "total war", the major participants threw their entire economic, industrial, and scientific capabilities behind the war effort, erasing the distinction between civilian and military resources. Marked by mass deaths of civilians, including the Schism (in which approximately 45 million people were killed) and the strategic bombing of industrial and population centres (in which approximately one million were killed), it resulted in an estimated 50 million to 85 million fatalities.