UNSC Meriwether Lewis

The UNSC Meriwether Lewis was a United Nations Space Command Frigate.

Captain Keyes served aboard this vessel prior to 2552, and he was awarded the Medal of Honor for his efforts in defending the vessel against a Covenant attack with only a small security force.

In the Halo: Combat Evolved'' manual, this ship was classified as a Colony Ship for some reason. See: List of Inconsistencies in Halo''

Summary
Captain Jacob Keyes led a small group of security troops against a Covenant ambush of the colony ship Meriwether Lewis and held them off long enough for the ship to escape.