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The earth's civilization has built three hemispherical defense systems around the wormhole passage, which are located at 100,000 kilometers and 10,000 kilometers away from the periphery of the wormhole passage, and 100 kilometers at close range.

Each defense system blocks each other, with the wormhole passage as the core, forming a huge defensive curtain in the void, even the innermost defense network, the amount of materials it consumes is extremely amazing, and its surface area is tens of millions of square kilometers.

The three hemispherical defense systems are made of large pieces of alloy metal plates welded to each other, the weakest part of the thickness has a thickness of thousands of meters, and the three layers of metal defense shields are stacked on top of each other, in addition to the integrated metal shields, behind these three defense layers, the earth civilization has also prepared a large number of alloy metal raw materials, which are connected with chains to form follow-up protection forces after the one-piece alloy shields, which are covered with dozens of layers, and the thickness of each layer of alloy armor is as much as ten meters.

In order to maximize their resistance to strikes, the earth civilization has specially installed energy shield generators on these shields, which can support the energy shield composed of multiple layers of energy force field on the outside of the alloy shield when a faster-than-light cannon strike is detected, so as to improve the anti-attack ability of these entity defense systems as much as possible.

At the same time, in order to allow these alloy metal shields to maintain their posture under the attack of countless superluminal cannon attacks of the steel battle star, the earth civilization has also installed a large number of power engines behind these huge alloy shields, and when the alloy giant shield is attacked, these power engines can continuously output power according to the force of the metal shield, so that these metal giant shields can maintain the relative distance and attitude between them and the wormhole channel, so as not to affect the safety of the alloy metal shields behind.

It can be said that until the defense system composed of these alloy shields is successfully destroyed, even if Iron Battlestar includes the wormhole passage in its strike range, the wormhole passage will be perfectly protected and will not be damaged in the slightest.

The only pity is that for Iron Battlestar, this last defense system has never been reliable.

Although the earth civilization has spent a lot of costs and costs in order to arrange these last lines of defense to protect the wormhole passages, and consumed a huge amount of alloy metal resources, this last line of defense is still too thin after all.

It's not that these alloy metal giant shields are not hard enough or thick enough, it can only be said that these can only be passively defended, and there is also a defense system with its extreme thickness, even if the earth civilization spends more resources to accumulate and pile up, this is a little unreliable after all.

Iron Battlestar has a total of nearly five million faster-than-light cannons, even if only a part of the faster-than-light cannons can be used, the firepower that can be poured into these alloy metal defensive shields is incomparably powerful, and even if these rigid defense systems can last for a period of time under the indiscriminate bombardment of Iron Battlestar, they will not last for a while after all, and there will inevitably be a moment of destruction.

Even if it is difficult for the Iron Battlestar to completely destroy these last few alloy armor lines in a day, two, three days and five days, as long as they are willing to spend time and spend a few more days, the defensive network composed of these alloy armors will eventually be broken through by the Iron Battlestar.

For the Earth civilization, if you want to protect the wormhole passage to the greatest extent, the best way is to be able to protect the previous star blockade system, so that it is difficult for the Iron Battlestar to find a suitable jump point, and there is no way to incorporate the wormhole passage into its own attack range.

In this way, no matter how powerful the lethality of the Iron Battlestar itself is, it will be difficult for it to truly threaten the safety of the wormhole passage.

It's a pity that this really practical defense system that can isolate the Iron Battlestar was finally broken through by the Iron Battlestar after supporting it for more than a month, allowing the Iron Battlestar to successfully jump within the range of the star field that threatened the wormhole passage.

In fact, when the earth civilization defended this starry sky blockade system, it should be said that there was nothing to criticize from the same to the end, all the places that should be paid attention to were paid as much attention as possible, and all the loopholes that could be patched were also patched as much as possible.

It's just that as the situation becomes more and more complicated, the repair of the whole system gradually becomes more and more difficult, and the maintenance personnel of the earth civilization have mobilized all the sub-light spaceships that can be mobilized, and even the space-time jump spaceships have been mobilized as much as possible to block the loopholes of the most dangerous jump points.

It can be said that the personnel of the earth civilization in the maintenance of this star blockade system have no place that can even be blamed.

Similarly, in terms of the construction of the star blockade system, the earth civilization has completely exhausted all its strength, and there is no omission.

After all, what the earth civilization has to guard against is the attack that the steel war star may launch from any side, and the earth civilization must be comprehensive around the entire directly subordinate star field, and it is impossible to leave too many flaws in either direction, and the amount of resources required to protect the entire earth civilization directly under the star field is too huge.

Just to establish a huge superlight cannon defense network with a thickness of light years around the entire directly subordinate star field, the number of superlight cannons that need to be consumed is already an astronomical amount, although according to the different regions of the earth civilization has been as dense as possible, but in order not to let any region have huge defense loopholes, the earth civilization has inevitably invested too many resources in other directions of this operation, so that around the battlefield of the jump point trap, the resources that the earth civilization can invest have become relatively limited。

Even so, all the resources and all the manpower and material resources that the earth civilization can use in this star field have been invested in the construction of the star blockade system as much as possible, and there are no big problems in the design of the whole system, and all relevant factors have been taken into account as much as possible, and all aspects of the work have been done quite well.

The reason why the Earth civilization finally completely lost this line of defense is that the firepower of the Iron Battlestar is too sufficient, and its lethality is so powerful that it is difficult to resist.

The earth civilization has arranged as much firepower as possible and as many tachyon artillery attack platforms as possible around the jump point trap, so that there are hundreds of millions of faster-than-light attack platforms around the trap jump point, and once the attack is completed, the attack strength that can be formed every second is unimaginable.

However, with its own super defense capability and the large number of ship-carrying troops it carried as a meat shield, the Iron Battlestar managed to maintain its own energy shield system under this super-large-scale attack, and relied on its unparalleled faster-than-light strike ability, it only took a few days to completely remove all the strike firepower arranged by the Earth civilization in its surrounding area, laying a solid foundation for its further interference in the star blockade system.

Also relying on this super firepower, Iron Battlestar attacked wildly in the area covered by the starry sky blockade system, so that in a short period of time, he relied on violent attacks to create a suitable jump point for himself out of thin air, which was a forced breakthrough by Iron Battlestar with his own strong strength.

The routine prepared by the earth civilization for the Iron Battlestar originally had no flaws, but the Iron Battlestar relied on its own hard power to create a huge flaw in the design without flaws, and the earth's civilization was helpless, and it couldn't find a remedy if it wanted to.

It can only be said that the Iron Battlestar is really worthy of being a strategic weapon of the cosmic-level civilization, and the earth civilization relies on the power of a directly subordinate star field, as well as the power support of the surrounding local areas, there is really no way to compete with the Iron Battlestar, which is completely a huge gap in hard power.

The defeat of the earth's civilization in the blockade of the jump point is also a crime of non-war, and there is no way to do it.

In this case, these last lines of defense in front of the wormhole passage have become the last resort to ensure the final safety of the wormhole passage, even if it is so fragile in front of the Iron Warrior, but it still carries the last ray of hope of the Earth civilization in this war.

Once the Iron Battlestar breaks the protection of these alloy metal armors and affects the stability of the wormhole passage, then the earth civilization will be completely disappointed in this war, and the entire earth civilization will face an incomparably huge threat from now on.

In order to hold the Iron Battlestar as much as possible, the entire Star Domain directly under the Earth Civilization at this moment can be said to be able to exert force, and they are all trying to deflect the Iron Battlestar's combat focus in every possible way, so that the main attack direction of the Iron Battlestar does not focus on this last line of defense.

The Earth Fleet, which was carrying out sabotage missions in the Resistance Alliance, had already done its best at this time, and they had launched an attack on some important underground bases in the Resistance Alliance's star field with almost no scruples and casualties, in order to destroy as many important targets as possible in the shortest possible time, and even wanted to paralyze the entire industrial system of the Resistance Alliance to a certain extent, so as to force the Resistance Alliance to ask for help from the Iron Battlestar as much as possible, so as to play a role in restraining the Iron Battlestar.

On the battlefield of the star field directly under the earth civilization, as the steel battle star jumped to a new position, tens of millions of ship-carrying troops began to lose the direct close support of the steel battle star, and the earth civilization faster-than-light strike fleet also began to concentrate firepower, launching the most ferocious and powerful large-scale attack on these ship-carrying forces.

In the past month or so, the Earth Fleet had only destroyed millions of carrier-carrying ships, but now as the interference source of the Iron Battlestar was far away, the Earth Fleet maximized its own striking strength, and the scale of the acquisition per unit of time suddenly increased by more than ten times, and the casualties on the ship-carrying forces began to be more and more inflicted.

The fleet of the Earth civilization did not expect the Iron Battlestar to jump back unwisely to support this ship-carrying force, but the Earth Fleet also hoped that the ship-carrying force would ask for help from the Iron Battlestar, so as to contain a part of the faster-than-light strike force of the Iron Battlestar.

The Earth Fleet, which is also near the Iron Battlestar, has also let go of its hands and feet to attack the Iron Battlestar, they have concentrated all their firepower, and have begun a large-scale targeted attack on some of the weak links that have been exposed by the Iron Battlestar, in order to complete this integrated attack plan, many Earth Battleships even did not hesitate to give up their own warship safety, gave up their own optimal evasion plan, sailed to some dangerous areas and cooperated with other warships, and launched an attack on the Iron Battlestar.

These Earth Battleships tried to use this method to contain the strike force of the Iron Battlestar to the greatest extent, so as to gain a certain amount of time for the continued navigation of the wormhole passage.

However, the Iron Battlestar has long penetrated the key to the entire battlefield, and all the means of the earth's civilization have not really affected the Iron Battlestar's sight.

As for the Resistance Alliance's request to try to get the Iron Battlestar back to stop the Earth Fleet from attacking, the Iron Battlestar didn't even bother with it.

For the attack on the carrier force and the Earth Fleet's concentrated fire attack on itself, the Iron Battlestar only mobilized the part of the attack firepower that did not affect the attack on the wormhole passage, and countered the attack on the Earth civilization to a certain extent.

All the offensive firepower that could attack the wormhole passage, the Iron Battlestar was concentrated, and launched the most fierce combat offensive against the last defensive facilities of the wormhole passage.

One round of attacks is millions of faster-than-light cannon attacks, these attacks span a distance of about four light-years, and it takes more than a day to attack the alloy giant shield in front of the wormhole passage, and in this long attack orbit of more than four light-years, the Earth civilization has also tried its best to move all movable objects, so that they can block part of the attack of the Iron Battlestar.

But Rao was like this, and at a certain moment more than a day later, hundreds of thousands of superlight guns still hit the alloy giant shield mercilessly.

Through the destruction time data of the many obstacles destroyed along the way, the Earth civilization has already obtained the accurate strike time of the Iron Battlestar, and has long had an accurate prediction of when the attack will arrive.

Therefore, a second before the arrival of the Iron Battlestar's concentrated fire attack, millions of small energy shields had been propped up on the entire alloy giant shield, and these energy shields that were originally used to act on the battleship immediately took effect, resisting this wave of concentrated fire attacks for the first time.