2554


 * Jul 'Mdama and his followers find the shield world Requiem. Over the next three years, the Storm try unsuccessfully to enter the shield world, gaining entrance in 2557.


 * December 15: Dr. Catherine Halsey, working on Ivanoff Station, files an audio log regarding the discovery of the Composer on the nearby Installation 03 and is fascinated by the similarities between the Forerunner device and the UNSC's AI matrix compiler.