UNSC Pony Express

The UNSC Pony Express is a that is described as both a UNSC corvette and a Prowler.

Battle of Earth
On November 3rd, 2552 during the Battle for Earth, the Pony Express was at or near Earth. After receiving a message from Dr. Halsey, Lord Hood planned on sending the SPARTAN-IIs to Onyx aboard the Pony Express, but they opted to instead capture a Covenant destroyer, the Bloodied Spirit, which they considered faster than the Pony Express.

Trivia
The Pony Express is a reference to the old mail system where riders would take fast horses from checkpoint to checkpoint, picking up mail and getting a new horse at each one. It lasted from April 1860 to October 1861, only slightly more than a year, but it made a major impact.

List of appearances

 * Halo: Ghosts of Onyx