Echao IV

== Echao IV ==
Echao IV is the fourth planet in the Echao System, and a world controlled once by the Unified Earth Government. Due to the series of events of a rapid Flood Outbreak on this recently colonized planet, the planet was abandoned in 2563 and it is now controlled by the Flood.
== History ==
=== Colonization ===
==== Post-Covenant war ====
the Planet was colonized in 2554, a year after the war with the Covenant. One of the Planet's regions, Qacral, is home to several forerunner structures, control center in the core, and a UNSC secret science base called Nexus Base to study further on Flood behavior, anatomy, etc. 
==== Nexus Base Flood outbreak ====
In 2564, an infested UNSC Halberd-Class Destroyer crash-landed nearby Nexus base, causing the flood to break into the lab, infecting every science, officer, and military personel in the complex. A company of marines and ODSTs that were deployed to the base were outnumbered and outgunned by the flood horde causing one of the scientists to send out a distress beacon to all UNSC Frequencies. few days after, the UNSC Enceladus received a distress call and arrived to the planet by slipspace sending Tristin-A261, his team with 2 new members, Daren and Madison to investigate the crash and clear out any flood inside the base.