The last in a series of short previews for the upcoming Halo 4 webseries Halo 4: Forward Unto Dawn was released today. The series is a prequel to the Halo video games, set in a time before the Human-Covenant war began. The UNSC's primary concern is "insurrectionists" who are vying for their freedom from UNSC oversight. The series' story will lead into the beginning of Halo 4.
Forward Unto Dawn follows members of the Corbulo Academy of Military Science as they train and fight for the UNSC. Previous trailers for the series have shown cadets enlisting, sharing their fears, and receiving a lecture while at the academy.
Today, the characters in the web series (some of whom have been seen in previous trailers) are all briefly introduced with reality-show-type interviews. Some of them were army brats born into the UNSC, while some of them simply aren't sure why they are there. No doubt their motivations will be tested during the web series when the Covenant (presumably) arrives.
Halo 4: Forward Unto Dawn premieres on October 5th, with weekly episodes on Machinima and Halo Waypoint leading up to the release of Halo 4 on November 6th.