In fact, the Black Tiger has already passed on the information of the discovery of the New World through carrier pigeons, and their patriarch has learned that there is a wider continent here, but he only knows that the Black Tiger has been attacked, and he does not know who attacked him, nor does he know whether the Black Tiger is dead or alive.

Since the Black Tiger had not returned for so long, the Sword Tiger Patriarch was worried that the race that attacked the Black Tiger must be very strong, so he had been hesitating whether to enter this area or not, and he had not yet made a decision.

For them, the danger of entering the unknown area is also very great, even greater than facing the threat of humans and other races, so before the Black Tiger did not return, the Sword Tiger Patriarch has not dared to move, but after a long time, he can't wait, in the past half a year, he can't wait for the slightest news from the Black Tiger, so he has started a new plan in his heart.

After learning this information, Zhang Jun also began to gradually strengthen his reconnaissance efforts, and the size of the reconnaissance team was more than three times larger than usual, mainly targeting the Mediterranean coast and the north of the Red Sea, and the great desert area leading from Israel to Egypt.

Entering Africa from the Eurasian continent, in addition to taking the waterway, you can only pass through the Great Desert, and the terrain of the Great Desert is very flat, so when most of the animals pass through, they will be clearly seen by the reconnaissance team, so once a large-scale animal comes to attack, it will definitely not escape the eyes of the flying dragon.

But the great desert area also has high temperatures, hot and windy sand, so many times, the dragon can not patrol normally, if there is an animal that can withstand the heat to the west, it is possible to avoid the eyes and ears of the dragon, but fortunately, the dragon has good vision at night, no matter what kind of creature, it is impossible to enter Egypt in a day, sooner or later it will be discovered.

From the mouth of the black tiger, Zhang Jun also learned about a strange race, the giant whale clan from the ocean, this giant whale clan often comes ashore to harass the sword tiger tribe, which proves that they have evolved limbs that can walk on land, and this special is actually something that their ancestors have long had.

The ancestors of cetaceans were originally mammals from the land, they originally had limbs, but after their eating habits became marine predation, their limbs degenerated into fins, and now, because of the advantage of being able to breathe with their lungs, their descendants frequently go up to land again, and some of them have become land creatures again, and have evolved limbs that can walk, and they can also survive in the ocean.

Cetaceans are an alternative creature, they can survive on land like seals, sea lions, manatees, walruses and other marine mammals, and after their ancestors entered the ocean, they returned to land, and this change is the choice after the generation of intelligence.

Black tigers have only seen cetaceans come ashore to attack land creatures, and have not seen other marine mammals return to land, so there may be the same phenomenon of marine mammals coming ashore as cetaceans in other waters.

In this way, the long coastline could have served as a strong barrier against all biological attacks, but for now, there are also cetaceans and other creatures that can reach any piece of land through the ocean, so that the continent no longer has a single entrance.

If these sea intelligence creatures are strong enough, they can land from any location and thus enter any area of Africa, which makes it very difficult for Zhang Jun's defense, he can prevent land creatures entering Africa through the great desert, but he cannot resist the widespread threat from the ocean.

In addition, in the southern region of Africa, in the big jungle, there are also intelligent creatures such as red-eyed dragons and lions, but their number has not been much, in Zhang Jun's reconnaissance for a hundred years, they have been hiding in the deep mountains and old forests in the central and southern regions, and are not used to living in deserts and open areas, so their specific number is unknown, and the red-eyed dragon clan does not have the ancestral god worship plot like the flying dragon and the flying dragon, they have long not known that they are the descendants of the allosaurus, and regard the allosaurus as their enemy, So Zhang Jun couldn't take them into his pocket.

After this threat, Zhang Jun decided to do one thing, that is, to strengthen the defense construction of Longzhai, the main work is to strengthen the thickness of the wall of Longzhai, transform the wall into a wall similar to the Great Wall, and expand the scale, so that it can not only resist the invasion of huge creatures, but also arrange sentinels and archers on the city wall, so that their protection ability will be strengthened a lot.

As soon as the idea was decided, Zhang Jun felt that without further ado, the construction of the city wall became the focus of the next period of time, and almost all the remaining manpower was invested in the construction of the city wall.

In particular, the huge Allosaurus, including the ground sloth, giant rat and elephant they raised, were used as transportation tools, and only they could carry huge rocks from the mountains to the dragon village.

The renovation project of Longzhai has been launched, and in recent times, Zhang Jun has been supervising the construction of Longzhai in addition to sending a larger-scale reconnaissance team.

Now the dinosaur clan is along the Nile River, there are a total of seven dragon villages, stretching for more than 100 kilometers, every 20 kilometers or so, there is only a dragon village, of which Allosaurus and Da Feilong are in a dragon village, they are in the northernmost area, Feiyue Dragon has three dragon villages, in the middle, Xiaofeilong also has three dragon villages, in the southernmost area.

The dispersion of Longzhai may cause weak defenses, of course, it can also stretch the defense line longer, resist a wider range of enemies, prevent the enemy from crossing the river and detouring, and surround Longzhai, so Zhang Jun decided not to gather all the dinosaurs in a concentration similar to a city for the time being, but to let them near the current few fortresses to resist threats from all sides.

With the current level of science and technology, it is difficult for ordinary creatures to cross the river to fight, as long as Zhang Jun holds the Nile Delta, from the Mediterranean coast to the south of the area of about 100 kilometers, the entire delta will be protected, no matter which direction the enemy enters, will be resisted.

And there is a strong air force, so no matter which dragon village is surrounded, relying on the advantage that the flying dragon can carry grain and grass supplies in the air, even if they are besieged for a long time, they will not be afraid.

In addition, the breeding area has also been planned into the Dragon Village, all the breeding areas will be surrounded, and the breeding areas that cannot be entered will be temporarily eliminated, so that those enemies who may invade the Dragon Village in the future will not be able to find enough food sources outside the Dragon Village, and sooner or later they will leave hungry.

In addition to the construction of the city wall and the expansion of the dragon village, Zhang Jun began to deploy combat preparations, but the most important thing is the material reserves, including weapons and ammunition reserves, bows and arrows, stones, spears and other weapons must be sufficient, so it is also necessary to expand a large number of weapons depots, the original weapons depot will be expanded several times, in order to store enough weapons, to wartime, there is enough ability to resist enemy attacks.