Horn of Abolition (location)
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This article is about the location. For the Halo Infinite mission, see Horn of Abolition.
The Horn of Abolition was a Banished outpost on Installation 07. It was responsible for Banished communications and acted as a listening post against the UNSC. It was destroyed by Master Chief during the conflict on Installation. 
At some point during the Banished occupation, some Marines attacked the outpost and managed to destroy part of the installation. However the attack did not fully destroy the installation, but there was hope for the UNSC to 'piggyback' off the Banished comms.
Later a Forerunner resonance amplifier was found nearby after interrogating some marines, allowing the Horn greater scanning power for UNSC remnants.
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