SPARTAN-140

Biography
SPARTAN-153 aka Sean-153 is a Spartan from the SPARTAN II program and is one the class II's Spartans. 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 Tori-154 aka SPARTAN-154 and Bodie-155 aka SPARTAN-155. He later was given command of SPARTAN Group Theta. He also has been paired with shipboard AI of the UNSC Warspite called Hera.

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 forced to fall back to the UNSC Warspite.

Battle of Diamond Point Shipyards: SPARTAN Group Theta is ordered to protect the shipyard at all cost by Fleet Admiral Elissa Barlow of the 309th Defence Fleet. During the battle with the Covenant, Spartan Group Theta along with the marines were able to hold off most of the boarding attempts. Following the complete and total destruction Peremiter Defence Stations Alpha and Bravo, most of the Covenant Fleet Undying Serenity including the assault carrier Infinite Justice which is the flagship attacked and destroyed most of the remaining UNSC forces. SPARTAN Group Theta and all remaining base personal and marines evacutate the shipyards. Sean-153 and the rest of SPARTAN Group Theta board the Warspite and later abandon the ship by using a Longsword Interceptor and the Warspite rams the assault carrier Unyielding Truth. Taking the AI Hera with them they are pickup by the UNSC Basilisk and later retreat through slipspace.

Battle of Amethyst: Classified

Quotes
"If you ever wanted to see the enemy up close, then just stay behind me."

"To all UNSC forces this SPARTAN Group Theta, we're inboud."

"Lock and load."

"Hi, nice to meet you too."

"Spartans, double time."