I figured this would be a cool experiment for creating a fan-made Halo story. I will start and anyone can continue the story with 2 sentences. But, please make sure your addition fits with the story (basically, don't reboot the existing story) and only include a PART of a story (don't include an ending). I want anybody to easily continue the story but I also want it to be relevant.
Here's my beginning to the story:
Spartan 222 "Joe" and a random marine were sent to observe the wreckage of a warthog. The wreckage they found was awful, but there were no bodies or sign of any drivers.
Now, continue the story!