> So you’re saying the 18:00 hours in the game is roughly equivalent to the 07:00 hours in the book?
Based on my theory this is how I see the events of August 30th, 2552.
Blue = The Fall of Reach/First Strike Time Stamp
Red = Halo Reach Time Stamp (approximate)
Orange = Elapsed Time
0400 hours (1603 hours)
The Pillar of Autumn begins preparations to leave the system when she receives word Reach is under attack. Captain Keyes was already aware of this but his crew, as well as the Spartans, were not. At the request of Dr. Halsey the Autumn lands on Reach to receive a package which will be Key to their missions success.
47 minutes
0447 hours (1650 hours)
Fermion Station at the edge of the Epsilon Eridanis system detects a larger incoming Covenant Fleet and enacts the Cole Protocol.
2 minutes
0449 hours (1652 hours)
Noble Team in possession of the Cortana fragment ditches their Pelican and proceeds to the Pillar of Autumn on foot. Noble One, (Carter A259), is Killed in Action destroying a Covenant Scarab. Noble Four, (Emile A239) and Noble Six, (Spartan B312), proceed to the Pillar of Autumn and deliver the Cortana Fragment to Captain Keyes. Emile is killed by an Elite and Noble Six protects the Pillar of Autumn by disabling a Covenant Cruiser.
30 minutes
0519 hours (1702 hours)
The Pillar of Autumn escapes Reach and proceeds towards the edge of the System. Captain Keyes informs John 117 of the Covenant’s attack of the Planet and the Spartan convinces the Captain to allow his Spartans to assist.
15 minutes
0534 hours (1717 hours)
The Pillar of Autumn engages the Covenant as they begin pouring out of Slipspace.
24 minutes
0558 hours (1741 hours)
The Pillar of Autumn receives word from Station Gamma that the UNSC Circumference has failed to purge its navigation data and Spartans are required to purge this data to keep it out of Covenant hands as per the Cole Protocol. John 117 splits his Spartans into Blue and Red Teams. Red Team under Frederic 104 will proceed to Reach to defend the SMAC power generators and Blue Team under John 117 himself will proceed to Gamma Station to purge the Circumference’s navigation data.
18 minutes
0616 hours (1759 hours)
John 117, Linda 058 and James 005 reach Gamma Station and engage Covenant forces. James 005 is KIA when his thruster pack ruptures and he tumbles into space.
Pillar of Autumn continues to engage Covenant Fleet.
21 minutes
0631 hours (1815 hours)
Red Team is forced to ditch their Pelican after encountering heavy resistance and crash into the trees. After regrouping they encounter some scattered Marines.
6 minutes
0637 hours (1820 hours)
John 117 and Linda 058 encounter a squad of Marines led by Sergeant Avery Johnson. John secures a Pelican and the Marines however Linda is hit multiple times with plasma fire. The group escapes to the Pillar of Autumn and Linda is placed in Cryo.
10 minutes
0647 hours (1830 hours)
While calculating a random slipspace trajectory away from Reach, Cortana factors in the data obtained from the Sigma Octanus Crystal and determines them to be coordinates to a location of unknown importance. The Pillar of Autumn then escapes the system and heads towards Halo.
2 minutes
0649 hours (1832 hours)
Red Team regroups and sets up defenses around ODG Facility A-331.
22 minutes
0711 hours (1854 hours)
Fred, Kelly and Joshua use stolen Banshees to deliver a Fury tactical nuclear weapon to a Covenant Cruiser via its gravity lift. The Cruiser is destroyed and Joshua is KIA.
33 minutes
0744 hours (1927 hours)
Red Team evacuates to CASTLE Base and encounter Dr. Elizabeth Halsey.
26 minutes
0810 hours (1953 hours)
Dr. Halsey treats the wounded Spartans.
7 minutes
0817 hours (2000 hours)
Noble Six continues to engage Covenant forces but is eventually overwhelmed and killed in action.
44 minutes
0901 hours (2044 hours)
Red Team resupplies and proceeds deeper into the caves below CASTLE Base as Covenant forces begin moving in on their position.