What if Poland had chosen a different path before World War II?

What if communism and the national soul are not incompatible, but rather forged into a sword of revenge?

Poland in 1936 was not destined to be a lamb to the slaughter. Lech Sowa, a young cavalry officer bearing an ancient noble surname yet harboring fervent ideals, saw a third possibility amidst the shadow of fascism and the decay of the old world. He resolutely "defied his ancestors," transforming his family heritage into the capital of an uprising. With exceptional eloquence and an iron will, he built an army from scratch—the Polish People's Self-Defense Army—a true people's army.

This was not a simple red wave. Lech's "Polish People's Communism" was rooted in the soil of national salvation, blending chivalrous honor with internationalist ideals. He navigated between cunning Moscow, arrogant Berlin, and a bewildered West, fighting for a glimmer of hope for the nascent regime in the cracks.

However, this was only the beginning of a legend. While the world believed Poland was already a vassal state of the Soviet Union, Lech's gaze was already fixed on the future. Deep in the Carpathian Mountains, a top-secret project codenamed "Prometheus" was quietly launched; and the apparent obsession with magical weapons like the "Nazi Bell" was merely a carefully woven smokescreen. When Poland's nuclear thunderclap exploded on the Baltic coast, and when bombers carrying the "Knight's Sword" leisurely flew over the Korean Peninsula, the world realized with horror that the game had already been completely overturned by this Central European knight.

From the ruins of Warsaw to the battlefields of Stalingrad, from the flames of nuclear explosions to the covert struggles of the Cold War.

Apocalypse tanks gallop across the plains of Siberia

Black Hawk fighter jets wreak havoc over the island nation

Dark clouds gather over Washington

In the southwest, nuclear bombs with long tails flew into the distance.

Countless umbrellas slowly fall from the sky above New York

…

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The title of the book is Knock on the Door!!!

A viral outbreak swept the globe, cities fell, and once-prosperous cities became zombie-infested infernos. Lin Chen, on the verge of despair, unexpectedly awakened the Red Alert system, gaining initial power enough to sustain his hope of survival from the start—an Allied base vehicle, well-equipped American soldiers, a powerful Grizzly tank, and the first funds to activate his base.

In this perilous post-apocalyptic world, he is no longer alone. The precise fire of American soldiers forms the first line of defense, the tracks of Grizzly tanks crush the corpses of zombies, and the massive Allied base vehicle is the foundation upon which he rebuilds order and fights against the apocalypse. Lin Chen must rely on the system to continuously expand his base, unlock stronger units and technologies, and, amidst the siege of zombies and the suspicion of survivors, use steel and artillery to tear a path to tomorrow for himself and those around him.

[Red Alert System + Invincible Flow + Unlimited Explosion]

Su Xinghe, who has traveled to a parallel world, learns that the apocalypse is imminent in a week. What should he do? Don't panic! Fortunately, he's connected to a Red Alert system. By selling the system's advanced technology, Su Xinghe earns a fortune to invest in military expansion. What? The apocalypse is coming? No worries, I've already built millions of troops. Watch how I quickly eliminate the zombies, unify the world, and then venture into the interstellar space, advancing from a first-level civilization to a ninth-level civilization, and ultimately to the highest level of civilization.

The protagonist Leon travels to the dark universe of Warhammer 40,000 and possesses the body of a dying Imperial soldier, Kane. In desperation, he activates the "Red Alert" system and obtains an MCV (Main Base Vehicle) that can be deployed into a base.

However, the initial units provided by the Red Alert system (such as Conscripts, GIs, and Grizzly Tanks) are vulnerable to Space Marines, Tyranids, and Chaos Daemons. In order to survive and thrive, Kane must utilize the unique advantages of the Red Alert system:

1. Asymmetric Warfare: Utilize Red Alert's rapid deployment, low-cost mass troop growth, and subterfuge tactics (such as engineer occupation and spy infiltration) to counter technologically superior enemies.

2. Core Advantage—Tiberium Crystals: The crystal seedlings provided by the system absorb the energy of the Warp and grow. Their radiation can purify and hinder the corruption of Chaos on a large scale, transforming desolate and deadly areas into "purification zones" and resource production areas. This "pure land" will become the foundation of his foothold in the dark universe.

3. Capture and Replication: The core feature. While Kane can't independently develop 40th-century technology, he can use his Psychic Control to capture enemy units (from Ork lads to Starships) and mass-produce them in a Replication Center. This allows him to continuously "copy" and absorb enemy technology, gradually expanding his own army. From replicating Orks and Tyranids to analyzing Imperial tanks and Space Marine power armor, he ultimately builds a powerful army that blends Red Alert's advanced technology with the might of 40th-century forces.

4. Strategic deterrence with superweapons: unlimited nuclear bombs, lightning storms, iron curtains, and teleportation

Ren Zhile transmigrated, taking the Red Alert: Mental Omega System with him to Terra.

Of course, it's neither Rhea nor Holy Terra.

It's Terra.

In this place, Oripathy ravages the land, war rages on, and natural disasters rage.

But don't worry, he has a system that allows him to deploy units within Mental Omega.

With these powerful units, they should be able to fight against any nation in Terra, right?

Koschke: "When he captured Talulah, I thought he was after Talulah, but when I saw a few bald men with strange helmets coming over, I should have realized he was after me!"

The outbreak of a virus has caused a new species to appear on the earth. They feel no pain, no fatigue, and only have a desire for flesh and blood. They keep running. They are - zombies!

The emergence of zombies is a huge challenge to mankind. In the long struggle between humans and zombies, the mountains and rivers changed color, blood flowed like rivers, and the land was soaked in blood and turned red. The glorious era of mankind has passed.

A new era has arrived, and humans call it the Bloody Age!

Su Wei, an illegitimate child who was kicked out of the house by his father, happened to get the Red Alert system. Watch how the protagonist climbs to the pinnacle of power step by step, tramples all those who have bullied him, and becomes the last hope of mankind.

In a twist of fate, David transmigrates into the body of an orphaned Latino-Chinese man, becoming David and unexpectedly activating the incredible [Great Power Manufacturing System]!

Arms, suicide squads, fighter jets, tanks... as long as he has money, there's no equipment he can't get!

From selling handguns on the street to selling AKs, Ka-50 attack helicopters, and even F-15 Eagle fighter jets!

After blowing up the vault, David turned around and sold anti-aircraft missiles to a Middle Eastern tycoon, and US warplanes put on an "aerial fireworks" show on the spot!

CIA Global Arrest warrant? David turns the tables and establishes a private armed force, the "Free Army"!

Tanks and rocket launchers were deployed in unison, and the government troops fled 300 miles overnight!

When he shattered the world's arms sales charts, presidents of various countries were shocked to realize: this madman was actually selling a "nation-destroying package"!

Yu Yuanyuan woke up to find herself transmigrated into a minor female supporting character in a novel. She knew she was about to be reunited with her family, but died shortly afterward. Now that she was in this world, she was determined to quickly reunite with her father, the Chief!

Modern man Fan Qing travels back in time to the 11th year of the Chongzhen Emperor's reign, when Li Zicheng suffered a crushing defeat at the Battle of Tongguan and Nanyuan. Leveraging known historical data, he rescues Li Zicheng from danger, helping him establish himself in the Shangluo Mountains and expand his influence in Henan. Due to Li Zicheng's flawed character and limited thinking, the two increasingly clash. Ultimately, Fan Qing seizes power in the Dashun Dynasty, stabilizing the people and alleviating their suffering. Externally, he resists foreign aggression and defeats the Eastern Tartars. He aims to enhance the might of China and rebuild the Dashun Dynasty...