SPARTAN-140

Biography
SPARTAN-153 aka Sean-153 is a Spartan from the SPARTAN II program and is one of the last class I's. Sean was born on Earth in the city of Albuequerque in the southwestern part of central North America. After being selected by Dr. Catherine Halsey he was taken to Reach where he began and passed all the testing and training that was given to him. During his time training he was able to befriend many of the other Spartans who were also in training. During which he made friends with Kacie-154 aka SPARTAN-154 and Bodie-155 aka SPARTAN-155. He later was given command of his own Spartan Group called Spartan Group Theta.

Battles
Battle of Jericho VII: Sean-153's first battle to be fought against the Covenant.

Battle of Miridem: The second major battle that Sean-153 fought in. Battle of Reach: The third major battle to participate in and the first time that Spartan Group Theta is deployed into battle, mostly aiding in the ground fighting and later in the evacuation. Spartan Group Theta is falls back to UNSC Warspite.