In the following days, Robben spent all his time in S.H.E.L.D. In the current laboratory, a large plaque was hung above the gate with the three big words "S.H.H.H.L.D." written on it, which made it look majestic.

A few days ago, the spontaneous combustion fuse was successfully developed by the young craftsman named Ding Ding. The principle is very simple. He added red phosphorus powder to the gunpowder twist and then breaded a piece of thick skin on the grinder. When it was to ignite the fire, he only needed to pull the thick skin off the twist. The friction force generated would ignite the red phosphorus and then ignite the fuse. Therefore, the research of the other version of the spontaneous combustion fuse was successfully carried out, greatly increasing the bomb throwing speed.

Robben also successfully developed grenades with several blacksmiths. This kind of grenade in another world is still very different from Robben's previous life. The technical level here is not enough to make grenades like those in his previous life. So Robben used a small iron jar made by a few blacksmiths to fill it with small steel balls and gunpowder, then sealed the hole and inserted a spontaneous combustion fuse on it, so a simple version of grenade was completed. In addition, Robben briefly explained the papermaking technique of his previous life to the twelve craftsmen, and then handed it over to them to study, striving to make paper that can be used as soon as possible instead of the sheepskin that is mainly used in the tribe. After a few days, although the paper has not been really made, it is not far from success.

In the past few days, the entire Thunder Tribe has devoted its entire tribe to the full production of gunpowder, bombs, grenades and anti-aircraft rocket launch systems under the guidance of the twelve craftsmen taught by Robben. The current Thunder Tribe, all the watchtowers and slightly higher roofs are equipped with an anti-aircraft rocket launch system designed by Robben. The coverage has reached full coverage of the entire Thunder Tribe. Moreover, the third elder has also ruthlessly installed several anti-aircraft rockets on the edge of the gates in four directions of the tribe to deal with threats on the ground.

Each of the three thousand regular warriors in the tribe was given three grenades. In addition, two thousand prepared combatants were recruited for bomb throwing training. Now they only need to stand on the tribe's wall and throw bombs outside, without charging. In order to prevent the wall from being knocked down by their own bombs, the Great Elder and the Third Elder also ordered all combatants to work overtime to increase and strengthen the entire tribe's wall. After Robben's test, it was only possible to easily withstand the power of the bomb.

There was busy outside, and Robben himself was not idle. In addition to practicing musket shooting every day, he kept doing various experiments, hoping to improve the gunpowder formula. Unfortunately, there was no big gain, and there was no good way to do this, so he could only make up for it. However, the current shooting level has been greatly improved. After feeding a large amount of ammunition, Robben can now basically complete the loading and shooting within ten seconds, and can basically ensure that he is not biased within twenty meters. In addition, Robben also took the time to ask the hammer to build two spears, which can hit more than one hundred meters.

Nowadays, Robben takes Kaka and a craftsman named Ding Ding to practice guns and do experiments every day. He lives a very comfortable life. He hasn't been to the martial arts arena for a long time, and even Natasha hasn't seen her for several days. To be honest, Robben misses Natasha quite a bitch. Obviously, this gangster forgot the habit of Natasha likes to step on his feet, which fully shows that this gangster is actually a bitch who has healed his scars and forgotten his pain.

Kaka has been having a lot of time recently. In the morning, he and Ding Ding went out to practice guns with Robben. Of course, the main function of him and Ding Ding is to help Robben reload ammunition. Now they have also practiced it. Ding Ding can also reload a musket in about ten seconds. Kaka is faster than him. The two of them take turns to help Robben reload ammunition, which can help Robben spend a lot of guns. In the afternoon, Robben is going to do an experiment, but Kaka is not interested, so he went to the martial arts arena to train. After so many years, it has made a lot of progress. So, today I am going to conduct an advanced apprenticeship assessment.

Kaka wanted to take the exam, and Robben felt that he should go and check it out, but he felt awkward, because he had his part in this exam, but because of several recent events, Robben had nothing to do. After all, he decided to go and check it out. After all, was Kaka participating in the exam (actually, this gangster just wanted to go and see Natasha), so Robben followed Kaka to the martial arts arena today.

As soon as he sat on the stands, he saw Natasha coming over gracefully. Natasha looked around and saw Robben sitting here, with a ray of light flashing in her eyes, so she jumped and ran over and sat next to Robben, and then said to Robben: "Bastard, why are you free to come to the martial arts arena today? I won't do any of your tests." Hearing Natasha's words, Robben turned helplessly.

Eyes, he said, "Caka Assessment, can I not come?" "You bastard have a conscience, hum~" The girl wrinkled her cute nose at Robben and made a face. Robben looked at the girl's cute expression and was lost. At this time, he heard the long-lost voice from Lao Gun coming from the audience: "Caka, Senior Apprentice Assessment, are you ready?" Kaka shook the double-sided axe in his hand, moved it, and signaled that Lao Gun had no problem.

When Lao Qian saw this, he didn't say anything. He turned around and opened a beast cage, released a beast inside, and then jumped and returned to the stands. A cheetah slowly walked out of the beast cage. It watched the environment with vigilance. Seeing an opponent in front of him, he did not attack directly, but cautiously circled around Kaka to find Kaka's flaws.

Seeing this, Robben asked Natasha: "Why are you using leopards for the advanced apprenticeship? Is Kaka okay?" Natasha said confidently: "Don't worry, the advanced apprenticeship is using ordinary beasts, Kaka no problem. He is a rare genius warrior. In terms of real strength, Kaka is no worse than me, so you can just watch it."

Hearing Natasha say this, Robben felt relieved, but when he looked at a chubby child holding a big axe against a beast, how strange it looked. At this time, the leopard had already circled around Kaka and found no flaws. It hesitated for a moment and decided to try to attack. So he took a few steps back first, then ran towards Kaka. Kaka looked at the beast rushing towards him, indifferent, and still stood there with an axe. Seeing Kaka didn't react, Robben was so shocked that his heart almost popped out of his throat. He couldn't help but pull out the musket from behind his waist and aimed at the leopard.

It was almost time for him to say that when he saw the leopard jumping, he was about to pounce on Kaka. The leopard's eyes showed the light of victory. At this critical moment, Kaka moved.

(End of this chapter)
Chapter completed!