Recovered Elements in the Elements series.
Not another Halo crossover plea- oh fine. *clears throat*
Presenting the LAST Halo/MLP crossover anyPONY will ever write(for now at least) and one I do hope you find entertaining. Real description begins now:

Second chances. We all need one now and then right? But in the wake of the war with the Covenant, the UNSC is anything but forgiving. No one knows this more right now than Captain Christopher Chase. Chase has a reason for doing what he did, one that may be exactly what humanity needs right now. But when it's discovered the Insurrectionists have taken over the Eridanus system, Chase must deal with the consequences of his actions, regardless of reason and stop humanity from tearing itself apart. In a galaxy in the grips of fear where all a captain really needs is a shot at redemption, most folks are more than happy to just say, "Screw you and the horse you rode in on." Most folks anyways.