"Yunzhou base is facing the biggest animal tide in China in history!" everyone in Yunzhou base was uneasy.


    Here, there are more than 40 million people, most of whom migrate from Yunzhou. They left their homes and lived here.


    Now, those mutant beasts have been chased and killed to surround the fortress city with a population of more than 40 million!


    "Can we defend?" the whole fortress city was filled with tension. Not to mention the ordinary people, even the heavily armed soldiers had no confidence in their hearts.


    After several clashes, the mutant beast was not repulsed, but became stronger and stronger!


    "We must keep Yunzhou base!" the whole country of China is dispatching troops to Yunzhou base for support.


    "This is our belly area. If it is broken by mutant animals, the whole land of China will be directly exposed to the threat of mutant creatures!"


    "All military materials should be guaranteed to Yunzhou base at the first time!" the whole of China paid attention to Yunzhou base.


    Recently, the defense of various cities is very tight. Even so, they still try to transfer personnel and materials to Yunzhou base for defense.


    Everyone knows that this war is very important! Arsenal and biochemical factories are producing day and night, and fighting is taking place on the supply line all the time.


    The mutant beast seems to know the importance of cutting off the supply line and has been harassed by mutant creatures, while the escort Corps is in a 24-hour state of preparation to ensure the safety of train and aircraft routes.


    ……


    "Can China''s Yunzhou base be held?" not only in China, but also in the world.


    Because so far, only China has been largely preserved under the invasion of mutant organisms. Other regions, even North America, once the strongest military power, are now fragmented and struggling to survive under the attack of mutant creatures.


    The defensive war in Yunzhou is not only to protect the safety of the people in Yunzhou, but also the hope of surviving mankind in the world!


    "We must hold on!" on an island in Asia, people prayed silently. Their living area had long been occupied by mutant creatures, and their hope for survival depended on the support of China.


    "Yunzhou has at least more than 500000 mutant creatures attacking, which is by far the largest animal tide in Asia!" the top leaders of peacock kingdom are cold when they look at the animal tide picture under the satellite picture.


    This time it was bombed with hundreds of nuclear bombs. It''s estimated that they can''t be completely destroyed!


    What''s more, they can''t easily use nuclear bombs next to Yunzhou base.


    Africa is the fastest occupied region after Oceania. Today, survivors gather in a few fortress cities to pay attention to the defense of Yunzhou.


    In Western Europe, the once powerful nations gathered together to resist the threat of mutated organisms from the Atlantic.


    For the animal tide in Yunzhou, they can only generate electricity to express their condolences.


    ……


    "The level-1 and level-2 mutant beasts are expected to be about 450000. We must use all our firepower to stop them!" on the eve of the war, a group of commanders in the headquarters of Yunzhou base were discussing tactics.


    "The number of level 3 mutant beasts is expected to exceed 30000! Each one needs a hot Weapon Combat Team to deal with it, while our Yunzhou plus the supported army has a total of 300000. Neither the number nor weapons are enough to deal with it!" said a commander.


    "Do you really want to use nuclear weapons this time? There are five or even six level variants in the insect nest. If nuclear radiation makes them evolve stronger..."


    The wisdom body in the insect nest cast a shadow on everyone''s heart. Until now, they don''t know what the commander of the beast tide, the high-level variant, looks like and has what combat effectiveness.


    "Keep waiting. The first batch of biological and chemical weapons are still on the way," Du Xingyu said.


    Three days later, the animal tide is ready to move.


    They are getting closer and closer to Yunzhou base, and some of them have had friction with humans. Human beings launch shells every day, but with little effect.


    There are mutant creatures in the animal tide that can intercept shells, and even weapons such as incendiary bombs will be extinguished by the thick fog sprayed by variants.


    At 3 a.m., Du Xingyu had fallen asleep. Suddenly, there was a violent explosion. The fire lit up the whole sky, and the air defense alarm sounded over the city.


    "The animal tide is attacking!"


    "Quickly organize the masses to hide in the biochemical protection center!"


    "Yunzhou combat troops are ready to fight!"


    "Turn on the air defense system!"


    "Pay attention to the sneak attack of mutant creatures under the ground!"


    ……


    "The animal tide is attacking?" Du Xingyu sat up. Through the biological computer, he immediately connected to the computer system of the headquarters to receive information.


    In the monitoring screen, we can see that a large number of mutant animals began to rush into Yunzhou base.


    At the external defense line, automatic weapons are constantly spraying bullets, missiles and flames to stop them, and the roar of animal tide resounds through the night sky!


    "Damn it, sneak attack at night!" in the headquarters, all the commanders have arrived and began to command the battle immediately.


    "The first wave is mainly secondary variants, and our firepower should be able to stop! Now it is mainly to keep an eye on the mutant birds in the sky and the mutant creatures under the ground!" commander Feng Zishi said.


    "The fighter has taken off. With the air defense system, there should be no problem in the sky for the time being. The masses have been transferred to biochemical defense facilities."


    "The night vision ability of the variant is better than ours, which is not conducive to our combat at night. Turn on all the strong lights outside, hold first and observe the enemy!" Li Tai ordered.


    Du Xingyu rushed to the headquarters and said, "generals, we must find the commander of the beast tide!"


    "Has the wisdom of the insect nest come out?" they were surprised.


    "No, it should not move." Du Xingyu analyzed, "level 5 variants have human wisdom and are enough to command the animal tide. If these variants dare to attack us, there must be level 5 variants!"


    "We must find them and kill them!"


    "OK!" Li Tai nodded. He shouted to the communicator, "pay attention to all units, look for the level 5 variant of animal tide, and report it immediately once found!"


    The sound of gunfire, explosion and the roar of animal tide made the whole Yunzhou base tremble!


    In the biochemical control center, the people hid in fear.


    "Mom, will monsters eat us?" a little girl trembled in her mother''s arms.


    "No, uncles and aunts are resisting them. They will drive away the monsters!" the mother comforted the child, but her own heart was also full of fear.


    Others were silent, and others were crying secretly.


    "Don''t be afraid, I believe we will win!" the staff of the shelter comforted them.


    ……


    More than an hour later, the first shock of the animal tide was finally stopped. However, this wave has caused huge losses to mankind. The first of the three-tier defense lines has been basically paralyzed, and many automatic military facilities have been damaged.


    "The animal tide is gathering, they are preparing for the second wave of impact!" in the command headquarters, Du Xingyu and commanders pay real-time attention to the war situation.


    They found that the bodies of the first wave of mutant animals were being eaten by their companions, and even some secondary variants. Because they swallowed the bodies of other variants, the concentration of Z virus increased and began to evolve at a speed visible to the naked eye!


    "They have become stronger in the battle!" Nie Xinling, a biochemical expert, took a deep breath and said, "the number of level 3 and level 4 variants in this animal tide will exceed our expectations!"


    "Is the second layer of defense ready?" Du Xingyu asked.


    "Ready," said Li Tai. "The second floor is very close to the city, and the third floor is basically the edge of the fortress city."


    "The second layer of defense will last at least three hours," said Du Xingyu. "The first batch of biological and chemical weapons can be delivered at seven in the morning."


    "Three hours!" all commanders felt great pressure. The first layer of defense only supported for one hour, but now the variation of attack is stronger. Three hours is too difficult!


    On the front line, the soldiers are taking an emergency rest.


    The wounded who withdrew from the first line of defense were sent to the rear for treatment, while those with combat effectiveness were directly incorporated into the second line of defense to continue fighting.


    Anti aircraft guns, air-to-air missiles, including laser weapons, are ready.


    "Brothers, we must support three hours!" ordered the front-line commander. "No matter what method, even if we die, we must hold these three hours! Until dawn, support will come!"


    "Yes!" the soldiers have long regarded death as home!


    "Zizizi..." it was the infrasound wave sent by some creature. The mutants heard the command and began to attack the second layer of defense.


    This time, the first is the tertiary variant!


    The bone armor Colossus, the fierce double headed blood cattle, the violent iron tyrant, and the crazy Python began to attack the defense line!


    "Boom!" a huge concrete wall made of reinforced concrete was directly smashed by the bone armor colossus. A mortar hit it, but it could break its exoskeleton, and the bone armor colossus continued to rush forward!


    "Stop, stop them!" the laser weapon has been activated. The hot laser pierces the bodies of these variants and cuts them in half!


    But these still can''t stop their impact. These variants don''t know what death is, and rush forward desperately.


    Those high-level variants with amazing defense were blocked in front, and the fire could not cover them all. From time to time, variants rushed forward, and the soldiers immediately controlled their weapons to fight them.


    "It''s terrible! We''ve lost 40% of our living power in only two hours and 14 minutes!" Li Tai''s heart is very heavy. Even if the ammunition inventory is gone, the sacrificed soldiers will never come back.


    "Level 5 variant, haven''t you found it yet?" Du Xingyu clenched his fist.


    "Found it!" shouted the commander of the second line of defense from the communicator.


    "In the northwest corner, there is a grade five variant!" his voice was full of panic and even despair!