Wait, So What Happens at the End of 'Halo: Reach', Exactly?

Some people might not be familiar with how the prequel sets up the original game, 'Halo: Combat Evolved.' So what happens at the end of 'Halo: Reach'?

Waypoint's Halo Bulletins

What happened to Jun after the events of Reach? : r/halo

Halo: The Story So Far

How to Play the Halo Games in Chronological Order - IGN

Halo (Franchise) - TV Tropes

Best Halo games

Current Objective: Survive : r/halo

Review: 'Halo' Joins the Ranks of Failed Video Game Adaptations

Current Objective: Survive. The perfect inversion of Halo's power…, by Antony Terence, SUPERJUMP