--- Portal Outskirts, 01/08/2030 ---

Tiago is in a Black Hawk helicopter of the Brazilian Army, alongside some high-ranking officials discussing the crossing of the anomaly that is set to occur in a few hours. As they approach the heliport, Tiago sees hundreds of armored military vehicles in a massive column, ready to cross as soon as the order is finally issued.

When the helicopter landed, he disembarked and was greeted by an Army Military Police (MP) soldier. "Are you Sergeant Tiago?" Tiago nods in confirmation. "Perfect, follow me, they are waiting for you."

As Tiago follows the MP, he sees hundreds of soldiers in formation, all perfectly dressed and armed with Imbel IA2 rifles. He arrives at a large tent, where two MP officers stand guard. After presenting his documentation and everything checked out, they allow him to enter.

Once inside, he sees dozens of Generals, all in discussion. The MP soldier who accompanied him goes to the operation commander and announces that the sergeant is in the room.

The commander looks towards Tiago and approaches him. When the man is close enough, Tiago salutes him. "Pleasure to finally meet you, Sergeant Tiago," said the Commander as he extends a handshake to Tiago, who promptly accepts. "Please, have a seat."

Tiago sits down, and then the commander continues speaking. "Well, as you know, the first wave of the counterattack will be composed mostly of androids. In total, there will be five thousand androids, one thousand infantry soldiers, and two thousand marines." The only thing that caught Tiago's attention was the fact that they were placing androids alongside the armored vehicles on the front line. "Guarani armored vehicles and Piranha armored vehicles from the Marine Corps will transport these three thousand troops as initial support for the androids. If the initial attack fails, these androids will be used to protect your rear while you retreat back to our side of the anomaly. Understood?"

Everyone agrees.

"Tiago, you will be part of the attack group, leading a unit composed of 50 soldiers, 2 corporals, and 35 androids. Your objective will be to assist in the defensive perimeter and initiate preparations for your spearhead project team to arrive. In total, there are 20 groups heading into enemy territory in search of our kidnapped citizens."

The meeting continued for a few more hours. When everyone was dismissed, there was only one hour left to begin the counterattack.

--- Counterattack, 5:00 AM ---

Tiago is inside a Guarani transport armored vehicle, waiting for 6:00 AM to begin the crossing. He then decides to repeat the orders again to his platoon.

"Attention!" everyone looks at him. The dim light inside the vehicle made the situation even tenser for the crew, but not for Tiago. "I will repeat our orders. We are going to cross this anomaly and assist the androids and naval infantry in creating a defensive perimeter around the portal. Rover images show us that a large number of enemies are lurking on the other side of this anomaly, waiting for us. And we will show them why it was not a good idea to attack our country. I must remind you all that the time zone beyond the anomaly is the opposite. If it is now early morning here, it is early evening there with exactly 12 hours difference."

As soon as Tiago finished speaking, the vehicle began to move. He looked at his watch and saw that it was already 6:00 AM. The mission was finally about to begin.

At the forefront of the convoy, the first Guarani Armored Vehicle began to cross through the anomaly. Within minutes, dozens of Guaranis and Main Battle Tanks (MBTs) were crossing the anomaly. The first transport vehicles that crossed were not carrying soldiers, but rather the androids.

It didn't take long for the Guarani Tiago was aboard to cross the anomaly as well. The sensation of crossing this anomaly was like jumping into a pool and feeling the water press against your body from head to toe, but without getting wet. Once the sensation passed, nothing had happened to their bodies despite clearly feeling like they had passed through some kind of liquid.

The first androids disembarked. The terrain was extremely green grass in a valley. As soon as they disembarked, the androids were greeted with showers of arrows coming from a hill. It was 2km ahead.

The armored vehicles launched smoke grenades to obscure the visibility of the defenders above. And it worked, the arrows shot in their direction decreased. This gave an opportunity for the androids to retaliate. Due to their night vision, they could identify the position of the archers and began to suppress fire.

Next, more armored vehicles joined the lines and fired at the hill. A group of naval infantry descended from their transport vehicle, bringing with them a medium mortar of 100mm with a maximum range of 6000 meters.

They, with the help of an android, positioned the mortar. The android provided precise coordinates, and the first shot was fired at the hill. Within seconds, an explosion could be seen at the top of the hill. Four more medium mortars were brought by the infantry, who corrected the coordinates along with the androids after each shot. The once peaceful and pure hill became a field of death. Dozens of explosions ended the showers of arrows, and a trumpet sound could be heard, signaling a possible withdrawal of the surviving archers.

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Finally, three Panther MBTs joined the fight and slowly advanced towards the hill, firing their powerful cannons and ensuring that nothing in their path remained. The androids and some infantry followed the MBTs.

---

Tiago can already hear the sound of intense gunfire and explosions when the armored vehicle they are aboard stops moving, and a green light illuminates the cabin as the doors open. Everyone disembarks quickly and forms a combat line. Tiago notices that on the left flank of the armored vehicles, a large cavalry formation is approaching at high speed. A Panther armored vehicle aims its powerful cannon and fires towards the cavalry. A powerful explosion precisely hits the formation, killing dozens in the blink of an eye. It reloads and fires again, causing even more chaos and destruction. Unfortunately, about 50 riders manage to pass the armored vehicles and ride towards the interior of the formation.

The 30mm cannons of the Guaranis unfortunately cannot fire so close to the troops on the ground to avoid friendly fire. They quickly dismount and draw their swords, heading towards the androids. Some of the riders are immediately killed by shots from the androids.

Tiago sees when one of the riders gets too close to one of the androids, which is forced into hand-to-hand combat. The android is incredibly agile and dodges the sword blows. It manages to disarm the rider and knock him out. The androids do not kill if the enemy is unarmed or does not pose a very large threat. In less than 5 minutes, all the riders were dead or captured.

"These androids are incredible!" said one of the soldiers in the platoon.

"Yes, they are..." Tiago turns his attention to his soldiers. "Attention! Let's advance to the front line slowly, let the androids cover our flanks, understood?"

"YES, SIR!"

--- 20 minutes after crossing the portal. ---

A large number of what appears to be thousands of infantry soldiers approach along with those monsters seen in the Battle of Campinas.

At this point, every enemy charge was in vain. They were easily destroyed by the accurate shots from the rifles and the explosions from the mortars and cannons of the MBTs.

However, the advance was slow; they had not yet managed to fulfill the objective of creating a secure perimeter around the portal, not while these men continued their charges.

Tiago sees a dozen Flakpanzer Gepard vehicles (armored with rapid anti-aircraft cannons) approaching. They are being escorted by soldiers. He is then surprised by the sound of the 35mm cannons of one of the Gepards firing into the sky. He looks in the direction of the shots and sees a group of seven of those flying creatures being obliterated in mid-air as they try to approach.

One of the soldiers says, "These beauties have a rate of fire of 1100 shots per minute. These flying things will never be able to get close to us."

Tiago knew how powerful the Gepards were, but seeing them in action for the first time is a great experience. The Germans really know how to make combat armored vehicles no matter the category.

The battles that followed became increasingly intense, with more soldiers crossing through the portal and joining the fight. Unfortunately, Tiago learned that a marine was killed by a lucky shot when an arrow hit his neck.

Even with some casualties and wounded, this time the objective was almost completed and with better results than initially planned. A perimeter of almost 7km was formed; the enemy continued to send more troops, but the army and the navy had already sent more than 500 armored vehicles through the portal, which, together with these efficient androids, managed to protect all flanks and the rear. Thousands of enemies were killed, wounded, or captured. Tiago saw a young enemy soldier lying dead on the ground; he was clearly just a teenager. Don't these enemies realize that these attacks are futile?

--- 2 hours after crossing the portal ---

The androids quickly and efficiently dug improvised trenches. All the armored vehicles were now covering their perimeters, and the advance halted; the objective now is to secure the surroundings of the portal. The initial advance consisted of 200 armored vehicles, 2000 marines, and 1000 soldiers, along with 5000 androids. Now the troops that had already crossed the portal exceeded 15,000 soldiers of the Brazilian Armed Forces. Some engineering vehicles were also crossing, aiming to build more complex fortifications and trenches. Tiago fires his rifle at a group of small green beings running towards his trench. They are fast, but Tiago has impeccable aim. And he is not alone; members of his platoon fire in the same direction, eliminating any enemy effort to retake their positions. One thing would become clear to them: the Brazilian army had come to stay. A Centauro 2 tank destroyer parks next to his trench and fires its 120mm cannon. The earth around trembled with each shot. The vehicle was firing at a horde of those green things. "Why do they keep trying to advance against us? Haven't they realized that it's impossible to get close?" one of the soldiers said while firing his rifle in semi-automatic mode. Tiago didn't respond, but he knows that his subordinate's question makes sense. The only thing that has not made sense since this whole situation began is the existence of another world and mythological beings. He thinks to himself about what else might be out there; now anything is possible since a true Pandora's box has been opened.

---

The suicide attacks of these creatures stopped, and for a few minutes, the entire front line was calm. No shots were fired as no creature or enemy soldier emerged. However, suddenly, fireballs appeared a few meters behind the hill. "ENEMY ARTILLERY!" an officer shouted in the background.

They were dozens of fireballs, now it really looked even more like they were fighting against a medieval army. Tiago crouched even lower in his trench as the entire area around the portal was bombarded by fireballs. Tiago raised his head and saw a transport vehicle being hit head-on by one of these fireballs. The vehicle exploded upon impact; its entire crew probably did not survive.

"What the hell is this? Do these bastards have artillery now?" shouted one of the soldiers next to Tiago.

He realized that they were not simple fireballs but rather spheres of incendiary rock. It was certainly artillery. But the drones did not see any type of enemy weapon that could launch these things, so how are they doing this? Tiago gives up thinking too much about it; nothing makes sense anymore.

The bombardment stopped, due to the high dispersion of the troops in trenches, it seems that the damage to the infantry was minimal and with few casualties. But something could be perceived. 10% of the vehicles that crossed the portal were destroyed or damaged by this artillery attack. One thing was certain: the enemy's target was the MBTs and the transport vehicles. Now a new objective has emerged, to eliminate the enemy artillery. The enemy has not carried out another attack yet, which may mean that this type of tactic has some kind of high cost for the enemy; we have to find out how they launched this attack and eliminate their artillery. Finally, the day was dawning in this new world; Tiago did not realize the time passing. The constant sound of artillery and rifle shots against the enemy make him lose track of time. A once beautiful green field now nothing but a place full of craters and puddles of blood with dead enemies.