In the early morning of August 15, 2025, in the Yellow Sea, near Baeknyeong Island on the border between South Korea and North Korea.

On the dark sea, the wind and waves are not big, everything seems unusually quiet, there is a frigate of the South Korean Navy "Gangwon" moored on the sea, but the ship is brightly lit, it is on the way back to the port, the main engine has failed, and it can only be repaired.

The captain of the ship, Lieutenant Commander Kim Jae-gyu, was very unhappy, and he was originally carrying out a thankless order, but he did not expect that on the way back, problems occurred again, which added fuel to the fire.

It turns out that Chinese fishing boats always cross the border to fish, and the South Korean coast guard is tired of coping, while Chinese fishing boats are getting bigger and bigger, and the coast guard's small patrol boats can't do anything about them.

I had to ask the navy for help, and the navy was also righteous, and sent the "Gangwon" frigate with a displacement of 2,300 tons to help, just to scare and scare the Chinese fishermen, but unexpectedly, the Chinese government raised a strong protest, and the South Korean president was not satisfied when he learned about it. It will seriously affect the relations between the two countries.

The Navy had no choice but to order them to return.

What Captain Kim Jae-gyu didn't expect was that at this moment, not far from the "Gangwon", under the sea, a North Korean pocket submarine was quietly approaching.

"Report to the captain, sonar has spotted a submarine approaching." The sonar soldier reported.

"Continue to monitor and report anomalies immediately." Kim Jae-gyu ordered, and then he continued to give the order: "The helicopter is ready for anti-submarine, the whole ship is ready for battle, and the base is reported." ”

Kim Jae-gyu knows very well that those who come are not good, and those who are good do not come, and in the recent period, the DPRK army has already carried out several operations along the "38" line, and the ROK army has already suffered several casualties.

Therefore, he should have judged that the person who came must be a North Korean submarine.

With the sound of the siren, all the officers and men of the ship entered combat positions, and the helicopter also took off.

Soon, the base's reply order also arrived, ordering him to sink the submarine in case of accidents.

Kim Jae-gyu let out a long breath, believing in his frigate and that it was capable enough to sink the submarine, provided that the North Korean submarine attacked.

At this time, the North Korean submarine was also busy, and the captain of the boat, Captain Li Hu, had already given the order to prepare for the attack of the torpedo, and he just wanted to get closer, so that the certainty of hitting would be greater.

This kind of pocket submarine can be said to be unique to North Korea, and other countries do not have it at all, although it is simply equipped, but it is fast and very maneuverable. Regarded by North Korea as its own underwater killer.

Lee's submarine had been roaming the waters near South Korea for many days, and he had been ordered to look for and sink the large South Korean surface ship, but he had not found anything at all, except in the military port, just small patrol boats sailing around on the sea.

He also thought about attacking the military port in South Korea and establishing a miraculous feat, but he quickly denied it, and he would undoubtedly hit the stone with an egg to attack the military port by himself.

There was nowhere to find it when he stepped on the iron shoes, and it took no effort to get it, but while he was looking for it, the "Gangwon" appeared in his sight, a frigate, and the "Incheon" class, it was great, it was it.

Of course, he also knows very well that the closer he gets, the greater the chance of being discovered, and for the sake of the motherland and the beloved leader, even if it is discovered, it must be sunk. Lee Hum made up his mind.

"Report to the captain, the target has been locked." The artillery commander reported.

"Good job, ready to drop depth charges." An ominous premonition flashed through Kim Jae-gyu's head.

"Report to the captain, sonar has detected that the submarine has slowed down." The sonar soldier's report came over the loudspeaker.

Slow down, no, it's going to launch a torpedo! Kim Jae-gyu reflexively realized.

"Depth charges, launch, launch." Kim Jae-gyu hurriedly shouted.

"All the ......, all the " With a loud sound, a string of depth charges was dropped into the sea.

"Boom" There were huge waves on the sea, and poor Li Hum was blown away by depth charges before he could launch a torpedo!

Kim Jae-gyu finally breathed a sigh of relief and showed smugness, and he ordered: "Report the base immediately, the North Korean submarine has been sunk by our ship when it attacked our ship." ”

"Torpedoes, torpedoes, ......" extremely nervous voices came from the loudspeaker in the command room.

"Torpedo?" Kim Jae-gyu's mind went blank, and immediately, he reacted, there were other submarines, not one, but ......

"Avoid, avoid, fast, fast......" Kim Jae-gyu's voice changed tone.

It was too late, it was already late, "boom, boom" With two loud bangs, the "Gangwon" was hit by two torpedoes.

Immediately after, a series of explosions sounded, and one of the incoming torpedoes hit the ammunition depot, causing a chain explosion.

The hull of the "Gangwon" tilted and began to sink slowly......

Kim Jae-gyu was stunned, looking at the blazing deck and the soldiers who were staggered and chaotic, he woke up and shouted loudly: "Abandon the ship, all abandon the ship, call the base, call the base, our ship has been hit and is sinking, ask for rescue, ask for rescue......"

Before the words fell, the warship began to sink rapidly, and it was too late, and Kim Jae-gyu, along with more than 100 officers and soldiers, was swept into the rough sea.

It turned out that the incoming submarine was not only Li Hu, but there was also another, in fact, it did not find the "Gangwon" in the first place, and the captain of the boat, Captain Pu Pu, wanted to float his boat to the surface to let his soldiers breathe.

Just as he was observing the sea surface with a periscope, he accidentally spotted a helicopter on the "Gangwon" hovering over the sea.

If there are helicopters, there will inevitably be large surface ships.

"Full speed ahead, target, helicopter." A brief order was given by simplicity

When he was still some distance away from the "Gangwon", he spotted Li Hu, who was preparing to attack.

"It's really fucking unlucky, let this kid Li Hum steal the first credit." Pu Shi was very uncomfortable, he had to give the order to stop advancing, he observed with a periscope, ready to watch the sinking of the "Gangwon".

What I never expected was that Li Hum was sunk!

"Six torpedo salvos, target enemy frigates." The launch order was given unpretentiously and decisively.

He was very aware of the anti-submarine capabilities of the frigate, so he did not get very close like Li Hu, but launched from a long distance.

Fortunately, two of the six torpedoes hit the "Gangwon" almost simultaneously, and this time, he really watched how the "Gangwon" sank into the sea.

At the same time, the helicopter that took off from the "Gangwon" also discovered him, however, the captain was in trouble, seeing that his warship was sinking, and the officers and men were struggling in the water. Or attack submarines?

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