Human Covenant War

The Human-Covenant war, commonly known in the 27th century as The First Bloody Conflict or Intersteller War of Destruction also known as The Great War, was a major interstellar conflict pitting the Unified Earth Government and its United Nations Space Command against the Covenant Empire during the mid-26th century between February 11, 2525 and March 3, 2553.

There were two known additional factions of the conflict: the Flood and a small number of surviving Forerunner constructs. Both additional factions proved to be invaluable to the efforts of humanity, as the information taken from Forerunner constructs and the Flood invasion of High Charity were helpful in splitting the Covenant apart in October of 2552.

The war was instigated by the Covenant, whose Prophets discovered that humans were directly related to the Forerunners. In order to keep the Covenant Empire intact, war was declared against humanity. Over the next few decades, the Covenant, with superior firepower and technology, overpowered humanity on many worlds, including heavily defended strongholds such as Reach. Aside from several notable triumphs, the UNSC would only win scattered and costly victories, most of which the Spartan super-soldiers contributed to immensely.

During the war, the Ocran Empire, were allied with the Covenant Empire supplying the Empire with new designs for their war against Humanity, including conducting some head on attacks themselves on the Human colonies of Asorda, Cerus, and Naizayia in 2551.

The conflict was closely connected with, and the cause of, the Covenant Civil War, both of which resulted in the final defeat of the Covenant Loyalists and Flood. The official cessation of hostilities occurred on March 3, 2553. The war was incredibly costly to both sides, with over twenty-three billion human casualties and enormous Covenant military losses, including the mobile homeworld of High Charity.

The war ultimately lasted for a total of twenty-eight years. The Ocaran Empire were stripped of their military power at the conclusion of the war and were forced to remain Isolated on their homeworld of Ocra, whom despite the UNSC at the time no longer knowing the existence of their world, this would force the Oceanics to restock on their crumbling economy by selling most of their weapons that they designed for the Covenant Empire to Jul Mdama an d the Covenant Remnants during the Promethean Conflict that lasted from 2557 to 2558.

Despite multiple incidents that occurred against Covenant Remnants led by Jul Mdama from 2557 to 2558, peace was restored between all species in the galaxy for the next decades to come. However another deadly conflict would occur 70 years after this first bloody War in the 27th century.