The battle for Firebase Bravo is getting more rough than before, the demon forces continues their onslaught against the walls while the flying demons that are known as 'Warlords' appearing in the east, coming down upon them. The marines on the ground fired upon these demons, Eagle-Nine assisted on shooting them down while the snipers, the plasma artillery, the marines on the walls and the ones inside the bunkers continues firing upon he demons on the ground. Doom would be one of them who was still operating that plasma turret, shooting down at the demons and stopping them from getting through.

The demons at the front soon brought in some more class of demons, one of them would be two Mancubus', seeing they are the same as what they were on Mars except their cannons look more bigger than before. Doom got a look at one of them as it takes aim and fires towards the bunker underneath him, instead of these smaller fireballs, it fired two huge red and yellowish fireballs across the area, seeing the projectile is faster than before. The men inside did not have a chance on evacuating, they were obliterated by the attack and that Mancubus fired a second time, hitting only the top and causing the whole area to crack up. This got Doom to abandon his gun and decide to jump down, jumping down over the wall and bringing the fight to them.

One demon warrior came at him, firing a couple of rounds at him while Doom runs at him, punching his face and drawing out a handgun that the demon had on the side of the waist. He spots three more demons shooting at him; he decided to hold the demon as a shield to take all of the hits. Doom uses the handgun he took off the demon and fired one shot through the demons in the face, sending them collapsing onto the ground with one shot. Once they were down, Doom kicks his demon onto the floor and got a look at this handgun. The gun had a model of the Desert Eagle handgun but was covered in black and had some red markings on some parts of it, seeing that it shoots out red energy blasts, a good shot could kill these demons with one hit.

That Mancubus that destroyed that bunker would soon target Doom, he notices it just now when it gets closer, firing another barrage of fireballs towards him. He would jump out of the way, sending those hits targeting the broken wall. The explosions and the damage causes the entire broken wall to finally collapse, showing an opening on where the demons could swarm through.

"The wall is breached!" Logan calls out when standing on the edge of the tower, looking out at the broken wall. He contacts the marines on the ground "All units, we have a breach, defend the broken wall now. We can't let them through."

Sergeant Travis and his Rhino Squad joins a couple of marines in the trenches, standing in front of the broken wall and starts firing. The demons will storm through but only a couple of them, seeing that Doom is taking care of some of them outside while the rest of the marines are busy with the flyers.

Eagle-Nine will still be firing rounds across the area, shooting at the flying demons and trying to avoid some of their projectiles, causing them to move back and get in range of their plasma artillery. The operator of the plasma artillery notices this now and stops firing; he would try to contact Eagle-Nine to move out of the way.

"Eagle-Nine! You are in range of my firing, get the hell out of the way."

"Don't worry we'll be fine." The pilot responds "It's difficult to move around without getting hit you know."

One of the Warlords was close enough to get on top of the watchtower, causing the snipers to look up and get up off the ground to take it out. The demon was not targeting them; instead, the demon creates a green fireball and throws it towards the Blackhawk, hitting the back propeller and triggering an explosion. They lose their wing and starts getting out of control, causing it to spin around, as they are unable to control it anymore.

"Son of a bitch we just lost the back." The co-pilot said

"Eagle-Nine is going down!"

Lauren would go inside the tower to kill the demon on the ceiling, she aims her rifle at the ceiling then fired where the demon is, sending her bullet through the ceiling and piercing through the head of the demon. Logan and the others watch as the Blackhawk was heading straight towards the marines on the ground, since they saw it on time they rush out of the way and jump down into the trenches for some cover. Once Eagle-Nine hits the ground, it crushes a heavy guard and causing the Blackhawk to turn to the side, sending its propeller still spinning and cutting down three marines in the process. After a few seconds later upon impact, the propeller finally stopped, leaving a hard impact on the base, killing the two pilots, two gunners, one heavy guard and three marines.

The marines on the ground stopped firing for a while after Eagle-Nine went down, very soon the Warlords came down and attacks them, they land inside the base and throws fireballs at the marines in the trenches. The marines would fight back but lost three marines already, seeing these demons are distracting them so the Cacodemons can fly over, targeting the plasma artilleries and the watchtower. The snipers would change to their regular machineguns to help shoot them down, Logan also join them too, joining the fight to help kill as many of the flying demons.

One Cacodemon moves above the men in the trench and let loose a fireball from its mouth, taking out two marines before it died. One Warlord grabs a hold of a marine who was out of the trench, trying to lift him up and fly high so its other friend could grab his legs and try to rip him in half. A few more Warlords flies over and throws some green fireballs at the marines before they land, trying to get close to do some brutal kills while the marines keep shooting back at them.

Doom was still running around out there while trying to deal with the Mancubus that is still shooting at him, causing him to go running to the side and avoiding the projectiles, using the Mancubus to hit the demon warriors that are in the way. Doom would go running towards the Mancubus once it killed twelve demons, he runs over with his machinegun, he does a boost jump to avoid its next attack. He switches to his grenade launcher; he fired once and sends it through the mouth of the Mancubus, blowing a large chunk of the top of the Mancubus before he hits the ground.

The Cultist that was standing on the hill got a look at the Doom Slayer as he goes charging after the second Mancubus. The demon gasps; it took a step back and spoke in demon tongue until it actually spoke out proper English. "The Doom Slayer…." It mumbled to itself then looks to one of the demon warriors that stood near it.

Doom looks back to the Cultist as it plans to reveal its ability; letting loose Hell Energy through that demon warrior, changing its body like a metamorphosis and causes it to lose its armour and the purple colour of its skin. The demon would soon transform into a Baron, a full fledge Baron but in a different colour, revealing that this Baron does not have red skin but orange skin and its lower body was black. Both claws and hooves are engulf in orange flames. This demon known as a Bruiser Demon, a demon that could rival the Archon of Hell and is right here, challenging the Doom Slayer.

Doom switches to the modified Chaingun he got from the armoury, firing bluish rounds at the Bruiser Demon as it runs over to him, swinging one of its flaming claws, and sends forth these barrages of small fireballs across the area. Doom would ignore them but avoid getting much hits while the demon rushes at him, seeing it taking a leap into the air and slamming hard onto the ground in front of him, causing him to roll out of the way. The Bruiser Demon swings its arm and let loose another barrage of fireballs at Doom, hitting his chest three times and pushing him back, Doom continued firing and hitting its chest, forgetting about the Mancubus as it comes towards him from behind.

The Mancubus was about to fire but stopped thanks to Lauren who fired her sniper rifle towards the Mancubus, hitting its face and causing it to stop. The marines on the wall fired many shots at the Mancubus, one of them was armed with a rocket launcher and fired twice, hitting the chest and losing a chunk of its body from the second rocket.

"It's your turn now." Lauren said when taking aim towards the Cultist that was watching the fight between Doom and the Bruiser Demon.

"Lauren!" One of the marines calls to her who stood on the other side on the edge of the tower, firing rounds at the Cacodemon.

Lauren looks back and sees it firing a fireball at them, seeing that marine took the hit and soon another flying demon shows up and grabs him. She aims her rifle at him while he is still alive, seeing the demon is using him as a shield then takes off with him to get out of her line of sight.

"Damnit!" She aims at the Cacodemon in front of her and fired through the eye and sending it falling. After that, she went back inside, calling to Logan who was inside giving orders through the radio. "We have to abandon the tower." Lauren said to him

"We can still hold the tower." Logan looks back at her "Keep shooting."

"We can't lose you in this fight while you're here, colonel." She said when moving closer to him "We have to get back onto the ground."

Doom and the Bruiser Demon was still fighting each other as he continues moving to the side and backwards just to avoid its flaming projectiles, taking some hits but ignored them. He keeps firing from his Chaingun, piercing through the chest until finally it was weak enough for him to charge at it. He moves next to the Bruiser Demon and grabs one of the horns to pull it off, once pulled off, he impales it through the side of the face and sends the Bruiser Demon to collapse. The Bruiser Demon turns to dust while Doom stood there watching it happen, after that he looks back towards the Cultist who stood there looking back at him, soon speaking in language to the rest of the demons, communicating with them and ordering a retreat.

The demon warriors heard the call for a retreat, causing them to lower their weapons and make a run for it out of the battlefield while the regular demons will be distractions. The flyers and other ground forces will attack the base, giving the demon warriors enough time to escape. Doom stayed where he was as he watches the demons escape, also seeing the regular demons attack the base with the marines focusing their fire on them right now. There was no way that Doom would let this go, he decided to look towards the hill where the Cultist once was and decide to go after them.

Sergeant Travis and his squad was defending the breaching wall, they soon realise the demons are retreating and notices Doom chasing after them. "Marine!" Travis shouts out to him, seeing he could not hear him as he still chases after them.

Travis was going to go after him but Corporal Rhodes grabs his shoulder "Sir! The enemy!" He points his gun to the side towards the wall, seeing a handful of Imps and a Cacodemon and some flying demons charging towards them.

"Damnit all…" He looks over to the demons and open fires

Lauren and Logan made their way off the tower and onto the ground, having Lauren cover Logan while he makes a run for it to the bunker, shooting upwards at the demons. There was a Cacodemon flying around the tower and aims towards them from the side, letting loose a fireball at them and causing Lauren to push the colonel out of the way before it hits. The blast would send the two flying back but were still alive; Lauren would just get back up and shoots at the Cacodemon, not knowing that a Warlord came down upon Logan. Logan draws out his handgun and started shooting at it but only fired two rounds before it got close enough to claw his face in, removing a large chunk of his head with one swing of its claws.

Lauren looks back at Logan as he fell onto the ground; she looks back at the Cacodemon and ends up taking a hit across the right side of his arm, sending her collapsing onto the floor. The Cacodemon would move closer to her, opening its mouth as it looks like it is going to eat her and not finish her. Just as that was about to happen, it took hits on the side by plasma rounds, seeing a couple of cyborgs came rushing out of the bunker, firing plasma rounds at the demons they see and kills them quickly.

Several of these cyborgs rushes out of the bunker, shooting the demons on sight. One of them came over to assist Laure. She would be looking at another cyborg nearby, seeing it jumping so high in the air, it lands on a Cacodemon and punches it in the eye before jumping off, and seeing it exploding before the cyborg hit the ground.

"Are you need of assistance?" The cyborg in front of her asks, lending his hand out to her

"I'm fine…" She said when turning over, having her back facing the sky and use one hand to hold her up so she could go up on her knees.

"You are in need of medical attention."

"Well no shit…"

The cyborg looks around then towards the wall, seeing the demons have stopped their attack, noticing the gunfire finally went to silent as the marines stopped firing. "The enemy has stopped…" The cyborg said to her "Has the enemy retreated?"

"Seriously?" She at last rises up off the ground, holding her broken arm and looking towards the wall, seeing the marines rising up out of the trenches and looking out at the sky.

The marines came out of the trenches and looks up at the sky, seeing that the demons are not attacking anymore, seeing they killed them all or they left. The men were finally relief to see it finally over, seeing that the battle only lasted for an hour or more, it started at dawn and the sun is still rising up over this field.

Rhino Squad came over to Lauren, seeing there is only three of them left now, it is now Travis and Lauren and Rhodes that remains of the squad. Rhodes came over to Lauren while Travis notices the colonel lying dead on the ground, Travis would sighs while taking off his helmet and crouching down, seeing the damage they have done to their leader. Rhodes would assist Lauren while the cyborg goes inside the tower, reaching to the top to see the whole status of the base and the outside of the perimeter.

One hour later: Sergeant Travis will be standing in the middle of the base, getting a look at all the bodies they have found, some of the marines would have some body parts missing but the main body parts would be place near them. He looks up then checks a good look around at the base, seeing so much damage that was done in a few hours, seeing the wreckage of the Blackhawk still there, noticing three plasma cannons are destroyed, the wall is breached and many buildings are in ruins. The demon warriors are now being place in a pile and began burning them, since they do not disintegrate like the other demons; it is up to the marines to incinerate their bodies until there was nothing left of them. All of their weapons been put in a pile, keeping their guns for later, thinking they could use them against them in future battles or modify their own weapons to match the demons.

Travis would take out a flask and starts drinking it while looking down at them; he would soon have some company when Corporal Rhodes stands next to him. "What a waste of life." He said when getting a look at the bodies

"Yeah…." Travis lends Rhodes his flask for him to drink "I think we lost half of our men in the attack."

Rhodes raise his head up while drinking, drinking half of it before lowering his head and lending it back to Travis "I'm relieved that they retreated, if they kept attacking."

"It was because of the Doom Slayer." Travis said while holding onto the flask

"You think so?"

"That Cultist could have continue attacking, continue making more powerful warriors but instead it chose to retreat with what is left of the demon army here."

Rhodes looks back at the wall then back to the body "I can't believe he ran off."

"He will be fine, he's probably going after them but I bet it's going to be difficult now to try and destroy the portal."

"So what's our next move then?"

"I'm guessing someone else at a high rank would be in charge, he would either order us to stay here or we go out there guns blazing at the demons."

"After what happen here… The new boss will probably order us to stand down and not attack."

"That's what he is going to do." Travis finish drinking the flask before he closes it up and puts it away. "Come on." He turns back "No point staying here all day."

"Alright."

Both Travis and Rhodes turns their back on the dead marines and move towards the bunker, getting Rhodes to go check on Lauren as she is in the medical room while Travis decides to stay outside. He stayed by the entrance and looks around at the place, soon to go out to help but something got his attention when someone calls out, seeing a marine pointing at the sky behind Travis.

"Reinforcements!"

Travis notices when walking forward to get a look at the airship, a large looking aircraft that hovers in the sky, holding at maybe five hundred meters long and three hundred meters wide. This aircraft had the UAC logo at the top of it; it shows that both corners at the front are arm with two railguns and shows two rectangular packs at the top back of the aircraft, showing they contain eight missiles each.

The aircraft hovers slowly into the middle of the base where a hatch underneath the airship opens up wide, dropping in a handful of marines onto the ground. One of them would appear different from the others, having a blue stripe across his armour that starts from his right shoulder to his left side of his waist. The marine took off his helmet when approaching Travis, seeing the man appearing in his late thirties, having short blonde hair and blue eyes. This marine would have a scar across the left side of his face, seeing that he has done major battles before.

"Who is in charge of this base?" The marine asks Travis

"Colonel Logan. He is dead."

"I see... Major Stevenson, leader of Raven Squad. I'm here to assist on the attack against the demon fortress on Operation: Tartarus."

"Well I don't believe this…" He looks back when noticing a handful of marines coming over to them. He turns back to Stevenson "You made the right thing on coming here." He then salutes to him "Sergeant Travis from Rhino Squad."

Stevenson salutes back to him "We heard the signal of the enemy attacking Firebase Bravo; sorry we didn't appear during the battle."

"Is this all you brought?" He looks behind him, seeing fifteen marines standing there

"Not just my squad." He looks back to his men then back to Travis "There are two more squads out there; the operation needs to be underway right now. That portal cannot stay in action for long, the UAC wants it destroyed immediately."

"Well you better go tell everyone else in this base. You might probably be the only one here who has a higher rank."

"That's why we are here. Take me to whoever is second in command of this base. If they are dead, I will speak to everyone here myself."

"Alright… Follow me then." He turns back and walks towards the entrance into the underground bunker, getting Stevenson to follow while his marines stays behind and so does the aircraft

The Doom Slayer finally found the location of the Hell Portal of where the demons fled to, he stood on a hill when looking across the area and there he saw it, a huge place where the Hell Portal lies, protected by a large wall that could stretch from miles, making this a huge area protected by many demons. The structures inside and the walls included, all have the same design as the structures in Hell, seeing that the demons have already begun constructing these places as they are getting to like this world. This portal here is one of a few that is across the world, and will continue to stay on until someone destroys it.

Doom loads up his weapons before charging in there, loading his machinegun, spinning up his Chaingun, checking the grenade launcher and holding onto the handgun. Once he is ready, he will begin to embark on his own to storm the fortress and destroy the Hell Portal and everyone else inside.