Bravo Team

"It's your mission to link up with Bravo Team and get that transmission sent."

- Sergeant Kelly, providing the Marine his next mission to link up with Bravo Team

Bravo Team was a squad of marines stationed on Mars City, appearing as major characters in Doom 3,  Doom Resurrection and The Lost Mission.

Doom 3
When the demons invaded Mars, much of the marine's contingent was overwhelmed, save for Bravo Team. They reached Marine HQ (before the player) where Sergeant Thomas Kelly (now at his new HQ Center in the Delta Labs) assigns their mission to "retrieve science personnel and eliminate hostile threats" along with "reaching the central communications tower to send a distress call to Earth's Fleet."

Later the player Marine arrives to the Marine HQ, much to the surprise and relief of Kelly. Kelly then assigns the Marine on his next mission to link up with Bravo Team, providing him the easiest path through the Alpha Labs. The Marine spends his time catching up to Bravo Team to rendezvous with them. Bravo Team, meanwhile, manages to proceed through their own mission.

Eventually by the time they arrived at Enpro Facility, a group of Imps and Wraiths ambush them, wiping out most of the squad. The player Marine eventually arrives and finds only a single survivor, mortally wounded. The wounded soldier gives him the transmission card to send a distress call to Earth's Fleet, before succumbing to a Wraith.

The Lost Episode
In the midst of Bravo Team's carnage, one Marine makes a close escape, leading him to Enpro Sector 1. As he fights his way through the demonic forces, he eventually encounters Dr. Richard Meyers through a communication terminal. Meyers explains to the survivor that his experiment has left one of his teleportation arrays in Hell still intact, which can allow the demons to invade as far as Earth if it is not destroyed right away. Under the guidance of Meyers, the Bravo Team survivor goes through the Martian facility, traveling to Hell to locate and destroy the teleportation array.

With the help of Meyers, the Bravo Team survivor ultimately succeeds. Dr. Meyers congratulates him for his efforts before they are both rescued by a medevac team from a DarkStar 4409 Dropship.

Doom Resurrection
In an earlier incursion in the same year (June 2145), caused by teleportation experiments gone wrong, an earlier original Bravo Team is wiped out except for one marine. Along the way he meets Dr. Garrett who introduces him to a flying drone robot Sam, who he sends to assist the marine, in an attempt to find a way off the base. He makes his way through overrun sections of the facility including EnPro, Delta Labs, and Alpha Labs, as well as his own trips to Hell where he destroys demonic teleporters before finding a way back to Mars.

On his way through the Alpha Labs, a door begins to close, and Sam selflessly sacrifices herself by jamming the door so he can escape. Before Sam is crushed, she ejects a data card for him to collect. Ultimately he makes it to a hanger, shortly where a group of survivors are waiting to escape in a dropship, and takes the datafile with information on the teleportation experiments in an attempt to expose UAC's unethical experiments.

However, it's noted that his attempt was not successful, and the UAC still managed to cover up the event (referring to it as only a 'regrettable accident', leading to the complete loss of the facility and all personnel) and are planning to rebuild the Mars facility with enhanced safety protocols and foreshadowing the events of Doom 3. Implying that they would be continuing the experiments among others.

Trivia

 * There are two Bravo Team members that have their name given: Sam Lane and John.
 * The team leader of Bravo Team is Sam Lane. His voice can be heard in the cinematic when Bravo Team gets killed. ("This is Lane, give me status.")
 * When the team gets wiped out, two Bravo Team marines do survive: the one that gives the player the transmission card (though he is killed soon after) and the lone survivor from The Lost Mission.

Quotes
"Command HQ, this is Bravo Team. We've got one marine down, two wounded."

"Command HQ, this is Bravo Team. We've got one man down and several wounded. We are incoming and need medical on station, stat!"

"Bravo Team, entry secure. Move in and take positions."

"Quiet! Did you hear that?!"

"This is Lane, give me status."

"Hallway's clear."

"There's nothing here, Sam."

"What the hell?!"

"Son of a bitch!"

"Lane, I'm swinging around left."

"I'm moving in!"

"Man Down!"

"John? Johnny?"

"I'm moving right! Cover me!"

"Watch yourself."

"Fire! Fire!"