Corporal Second Class Colemil and His Conscripts
The Marines of the 12.7 mm Machine Gun Company, attached to the 7th Infantry Regiment (RI-7) on Mount Longdon, prepared the defence of their position as they were accustomed to: deep works with shelters, crawl trenches, ammunition depots, and so on—always working to perfect them. It was the best way to pass the time before going into combat, for they were convinced they would have to fight, and constant work was the best way to endure the wait, according to Marine Corps tradition. When the British assault came, they saw the wisdom of that attitude. Those who had not done so suffered needless casualties and could not fight effectively. 
Two days before the attack, Corporal Second Class Colemil went to the Marine Corps Combat Support Service, where Lieutenant Scotto told him: “Vizcacha” (another of Colemil’s nicknames), “here you have the night sights that have just arrived—take these for the rifles and for the machine guns.” Colemil took three rifle sights, giving one to his commanding officer, Lieutenant Dachary, another to Chief Corporal Lamas, and keeping the third for himself. He also carried six Litton sights for the machine guns and five or six head-mounted night vision devices, which turned out to be of little use. The following day, the Marines spent time training with the night sights. 
The Night of 11 June 1982
Carlos Rafael Colemil, in charge of a 12.7 mm machine gun (the westernmost on Mount Longdon), had escorted conscript Leiva—who was feeling unwell—to the aid post. Once checked and treated, Leiva was authorised to return to his position. On the way back, they passed Corporal Lamas’s machine gun, where Lamas warned Colemil: “Stay very alert. Don’t let your guard down; they could attack tonight.”
They carried on walking. When they reached the rest shelter, Colemil woke the relief shift, and with the two conscripts who had already completed their watch on the 12.7, began his nightly patrol. They paused briefly at the Army’s Racit radar (an infantry radar used to detect the enemy) and exchanged a few words with the sergeant operating it.
“Get into the dugout; they’re going to start firing,” the sergeant warned.
The radar—capable of detecting enemy infantry movements—was switched off at 8 p.m., as British ships had detected it and subjected it to naval gunfire from the south, an action that facilitated the infiltration of British paratroopers. About a company’s worth of these paratroopers made their way through the minefields without triggering any devices. Silently, they infiltrated the sector occupied by 2nd Lieutenant Juan D. Baldini’s section of the Bravo Company, RI-7, whose frontage faced west on Mount Longdon.
Colemil and the two conscripts continued moving among the rocks until he stopped and looked west through his FAL rifle’s night sight. To his surprise, he saw a diffuse shape moving not far away. Uncertain, he aimed the FAL at the spot and fired a shot. In response, he heard the unmistakable chatter of a Sterling submachine gun. There was no mistake—it was the enemy, and they were close. At that moment, a paratrooper stepped on a mine; the scream and the explosion alerted all of Mount Longdon.
Once he had located the enemy, Colemil ran to the rest shelter and phoned Lieutenant Dachary’s command post.
—“Cobra, this is Araucano. Cobra, this is Araucano.”
—“Go ahead, Araucano.”
—“Attention, guns— we’re under attack, we’re under attack.”
—“Received.”
(The machine guns were connected to Lieutenant Dachary’s command post and also interlinked with each other.)
While Colemil was alerting his commander, the fighting spread. Thanks to the advantage of surprise, the British managed to gain a foothold at the western end of the mount, advancing with machine guns, rifles, and 66 mm and 84 mm rockets. The atmosphere was hellish. Colemil marked targets with tracer rounds from his rifle, aided by the night sight.
Suddenly—air raid alarm. The Argentine infantrymen dived into their foxholes, and as soon as the artillery fire ceased, they emerged to continue firing. Then more rounds came crashing in.
Outnumbered but Still Fighting
The paratroopers took advantage of the moments when their enemies were in the foxholes to advance, overrunning Colemil’s position, leaving him cut off and unable to contact Lieutenant Dachary’s men. Far from discouraged, Colemil kept firing the 12.7 mm, but before long the weapon jammed and was put out of action.
From then on, it was a long night for “the Araucano” Colemil—a brilliant corporal who, through determination and courage, caused the British many headaches and inflicted numerous casualties.
“Well, we’ve got rifles and plenty of ammunition,” he told conscripts Ferrandiz and Leiva, who had stayed with him. “Let’s blast them.”
“Corporal, there are hundreds of them,” said Ferrandiz.
“All right—we’ll let them pass and then hit them from behind.”
Suddenly, Colemil saw some British troops trying to set up a mortar. “These ones aren’t getting away,” he thought aloud and began firing at them, wounding one and forcing the rest to withdraw.
“Behind you, corporal!” shouted Leiva as three paratroopers charged towards them. Colemil spun round and fired a burst of about fifteen rounds. One Briton fell, and the other two, wounded, withdrew, shouting.
Lying prone, the corporal searched for enemies through the rifle sight. Whenever one came into view, he put him out of action. Alone, he caused havoc among those trying to take the Argentine positions in that sector of Longdon, while his conscripts supported him with their rifles. 
At one point, he saw the enemy attempting to recover a recoilless rifle that was near his position. He opened fire, saw one Briton fall, and then came under heavy retaliatory fire. “If I don’t fight, I’m dead,” he thought. He began crawling from position to position, opening fire whenever he spotted an enemy. He saw a Briton standing on a parapet with a bipod-fitted rifle, shot him down instantly, and then fired at his comrades trying to approach—likely to recover the weapon.
In an attempt to peer out for more targets, Colemil was hit— the bullet struck the front of his helmet, pierced it, entered his scalp, and stopped at the nape of his neck. A paratrooper, barely twenty metres away, had thrown a grenade which exploded nearby, but a rock had stopped the shrapnel. As Colemil rose to seek him through the sight, the same man fired at him, the projectile grazing his head.
(Because the wound ran from his forehead to the nape, Colemil earned the nickname “Piggy Bank.”)
He immediately felt something hot running down his face. Dazed, he tried to stand, but managed to recover the rifle in time. As soon as his attacker appeared from behind a rock, he aimed at his chest and fired. The Briton let out a cry of pain and fell heavily on his back, arms spread.
“Corporal, let’s bandage your head,” said Ferrandiz.
“Yes, but quickly—we can’t stop firing.”
“We’re cut off. We can’t hold out much longer.”
By 3 a.m., they were also under friendly artillery fire, their own side believing the position had been taken by the British.
“Corporal, why don’t we surrender?” both conscripts said at once.
“No way. I won’t be taken prisoner. I’ve no wish to have my throat cut.”
“But, corporal—”
“I’d rather shoot myself than be taken prisoner.”
“Then let’s withdraw,” insisted the conscripts.
“All right, let’s go. We’ll link up with Corporal Lamas.”
“I’ll get you a helmet, corporal.”
“No, forget the helmet. Let’s move.”
Crouching low, they tried to leave the position, covering a few metres before being forced back by rifle fire. Colemil had put up a fierce resistance; it was clear they had his position pinpointed.
At around 03:00 hours, Corporal Colemil decided to fall back to the Bravo Company, RI-7 command post, seizing a momentary lull. The three men took the opportunity to move out, but again came under fire. The two conscripts escaped, but Colemil was shot in the leg. He tried to crawl away, but after a few metres, he lost consciousness.
When the British advanced, they left him where he was, assuming him dead. Corporal Second Class Colemil was taken prisoner and only regained consciousness aboard the British hospital ship Uganda, where surgeons fitted a platinum plate to his skull.
That night of 11 June 1982, he expended all five FAL rifle magazines and reloaded twice. British publications mention a “sniper” who caused them many casualties—very likely Corporal Carlos Rafael Colemil himself.