This left a deep impression on Thies Byron, who was living in Belgium on the border with France and was just in her first year of high school. According to her story, people called that day "Invasion Day."

On the day of the invasion, the French army dispatched chemical defense troops and successfully eliminated the remaining beasts that had escaped from the periphery of the radiation zone. The air force also locked the portal in the shallow sea area.

Byron also said that the news and various programs in those days took turns to broadcast content related to "invasion", "alien" and "nuclear explosion".

It is said that humans have investigated and researched the portal and tried various methods, including dropping nuclear bombs again, but they were unable to close or destroy the portal.

On the thirtieth day after the invasion, France faced a second wave of attacks, but this time the French army and humans were naturally well prepared.

Carrying out indiscriminate bombing without using nuclear bombs, the French army easily defeated the second wave, which greatly encouraged people's confidence in dealing with the "monster".

After all, the first invasion was too sudden. To reduce casualties, tactical nuclear bombs were the best choice.

The sixtieth day is the third wave.

In this way, people have figured out the attack cycle of monsters, and each monster will be stronger and harder to kill than before.

But at least, there was only one portal at that time.

On July 4, 2014, two more portals were opened in the shallow waters of Sydney, Australia, and Vancouver, Canada.

The emergence of the three portals led to the establishment of the "United Government" and the "United Military Defense Force". Humanity as a whole became unprecedentedly united and worked together to fight against the invasion of monsters.

On July 4, 2016, two portals were opened in New York and Mombasa, Africa. On September 3 of the same year, Paris was first destroyed by the invasion of giant beasts, and nearly one-third of Western Europe was affected.

As time goes by, more and more portals are opened, and more and more frequent invasions allow people to see the reality clearly——

There is simply no way to prevent the "end of the world" from coming.

The earth's environment has also become worse with the invasion of monsters, and it is gradually no longer suitable for human habitation.

Faced with this situation, humans seem to have only two options.

One, escape from the earth.

Two, hide underground.

In fact, there are three more, which is to continue to abuse nuclear bombs...

If you choose this option, humans can eliminate themselves in advance without using monsters.

And with the technology of this world and the combined efforts of all mankind, it is indeed possible to send a very small number of people to the moon and Mars.

But whether we can gain a firm foothold on the moon and Mars and survive for a long time is unknown.

Moreover, the human heart is the most complex existence. Once the first option is adopted and the vast majority of people know that they are waiting to die, there is a high probability that society will fall into unstoppable turmoil.

Therefore, the coalition government announced the "Underground Fortress" plan on January 1, 2018.

Due to time constraints and the convenience of mobilizing manpower and material resources, people had to build strong fortresses with complete circulation systems a hundred meters below each city, or even deeper.

It was the year that the fort plan was launched that Thies Byron, who had lost all his family members, joined the army and was deployed to defend West Africa with the troops.

2012 to 2026.

The war that lasted for fourteen years drastically reduced the total number of humans, from nearly nine billion at its peak to five billion.

End of 2026.

A total of fifteen portals have been opened around the world. Monsters that have undergone multiple "evolutions" are about to wreak havoc on the surface, and the remaining humans are forced to move underground.

But before going underground, the combined military and defense forces dropped a large number of nuclear bombs on all portals, instantly killing hundreds of millions of monsters and completely destroying the ecological environment near the portals. The entire world was affected by this.

However, destroying the surface environment has long been out of the scope of senior generals' considerations.

Although the army could not resist the giant beasts with certain resistance to nuclear bombs, it could kill the smaller beasts. So for the next four years, people used solid facilities, maze-like tunnels, and layers of gates to hide in the fortress.

Survive in the city.

However, this only slows down the rate of humankind's demise.

Byron said that the Rabat Fortress where they lived and defended was relatively lucky. They had lived underground for almost three years before the monster responsible for assimilating the ecological environment "belatedly arrived."

The Rabat Fortress could handle the initial harassment by a small group of beasts calmly.

But with only 30,000 people living in Rabat, its self-sufficiency is completely inferior to that of large fortresses such as Moscow and Toronto.

Until June this year, large numbers of monsters arrived one after another, which increased the pressure on Rabat.

In July, ammunition was running low and the number of casualties continued to rise. Without the arrival of the Blood Angels and the Spartan Legion, the final outcome of Rabat Fortress was self-evident.
Chapter completed!