The scope of the "world" of human civilization has expanded with the advancement of science and technology and the improvement of modes of transportation.

In primitive tribes, humans could only move by foot, and the territory of a settled tribe often took only a few days to traverse, and it shrank depending on the abundance of the property. The world in the eyes of this tribe is the range of its own tribe and several neighboring tribes, and at most some legendary tribes from afar.

The world of nomads is larger, because they are always on the move, but they are still restricted.

Terrain that is not suitable for human survival, such as deserts, polar regions, large rivers and mountains, will block the migration and movement of human beings, and divide human civilization into small closed worlds.

Only with the advancement of transportation and the exploration of suitable paths by brave pioneers can different small worlds be connected into one big world.

The Eurasian continent is the largest continent in the world, but the frequent exchanges between the east and west sides of the continent did not take shape until the opening of the Silk Road, after which the Eastern and Western civilizations began to accelerate their development through the exchange of technology and species, making the Eurasian continent and North Africa a de facto big world.

Before the Age of Discovery, there were three densely populated civilizations throughout the Americas: the Mississippi River Basin, the Mesoamerican Jungle, and the Peruvian Plateau. However, these three civilization regions are separated from each other by deserts, isthmuses, etc., and there is little communication between them, so they are almost all independent small civilizations, and cannot be counted as one big world.

It is easier for the big world to progress and lead in technology, because the big world has become more advanced in agriculture through the exchange of technology and species, and can support more people, which has increased the demographic fundamentals and probability of technological progress. And new technologies are also easier to communicate, triggering learning and imitation.

But it is difficult to do so in a small world such as the Americas, which together are only a little smaller than Eurasia and North Africa, but which are divided from each other, have developed slowly. The Maya invented the wheel, but because there was no suitable livestock, they only used the wheel for toys. The Incas had the only large livestock in the Americas, the alpaca, but they had no wheels and therefore no vehicles. This is precisely the tragedy of civilization in the small world.

What the protagonist is worried about now is that he is in a very backward small world.

The land on both sides of the river is too small, although in the eyes of the Big-headed Ant Kingdom and the Paving Ant Barbarian Kingdom, they are both great countries with vast territories, and they have almost reached the limit of what the existing technology and organizational system can rule.

However, from a human perspective, the land on both sides of the river is nothing more than a small mountain basin that can only accommodate one or a few small human villages at most.

But this is the place of projectiles, which is the whole world that the protagonist now knows. Naturally, such a small world cannot be expected to develop such an outstanding civilization on the basis of self-reliance.

What if one day a civilization from the outside suddenly appeared, with more advanced technology and weapons that were difficult to resist? The protagonist can't imagine that the encounter between the American Indians and the Aborigines of Australia has already given the answer. And the world of ants will obviously be even more cruel, and perhaps even reservations will not be charity.

So, the protagonist wants to explore the wider world.

But for ants, it is too difficult to migrate and move long distances.

Terrain can be a moat that hinders human movement, and the same can be true for ants, and much more.

Although ants are distributed all over the world, they show a decreasing pattern from the tropics to the poles. Cold and drought will deny ants the survival of an area.

A rushing river or a wide lake can stop the expansion of the Ant Empire, and a tall mountain range will make the ant colony marvel. Some ants can adapt to the desert, but most cannot. These terrains hinder communication between ants, dividing them into small fragmented worlds.

Even in the easily mobile plains, the territory of countless ant kingdoms will not allow ants of other races to pass freely. And in the limited knowledge and experience of the protagonist, the ants have no concept of merchants. It's either an ally or an enemy, and even this simplistic duality has become an obstacle to the ants from exploring the wider world.

Perhaps, this feat can be accomplished only by forceful means. Just like after a thousand years of division and war, Japan had the energy to look beyond the archipelago for the first time.

Therefore, this winter, the protagonist is extremely eager to achieve absolute superiority on both sides of the river, become the sole ruler here, and put an end to internal strife. Then you can use all the resources of the entire region to try to explore the world beyond the banks of the great river.

This small basin on both sides of the Great River is a dead end to the east, blocked by mountains and lakes except for the outlet of the Great River.

To the south, the protagonist has never been, but in the ancient legend of the Big-headed Ant Kingdom, there are also rolling hills and mountains, with aggressive and ferocious indigenous mountain ants, and snow-capped mountains that are difficult to climb. At the beginning, the big-headed ant kingdom was forced to enter the plains after the development of the southward was not smooth, and as a result, it achieved hegemony on the south bank of the Great River due to a blessing in disguise.

To the north, it is still the territory of the Paving Ant Barbarian Country, and the protagonist only has a limited understanding of this place, mainly from his original northern reconnaissance operation and the confession of the Floating Leaf King. It is understood that in the dense forests and mountains in the north, the paving ant barbarian country has a strong enemy - the mountain ant clan. They are more suitable for the environment halfway up the mountainside, and their military strength is also very strong, in the eyes of the paving ant barbarian country, the mountain ant is the main enemy, and it also contains eighty percent of the military strength of the paving ant barbarian country, and the big-headed ant kingdom is just a disease of scabies in the south. So it's not a good idea to expand into the mountains to the north.

The rest, which is also the direction that the protagonist prefers, is the West.

Although the protagonist does not know much about the West, he only knows that there are similar dense forests and mountains there. However, it was from the west that the remnants of the big-headed ants drifted down the river.

According to the Big-headed Ant Remnants, there are more and more advanced ant civilizations in the west, and there are more than a dozen ethnic groups and countries that can be called in the remnants of the Big-headed Ant Remnants.

Moreover, the remnants of the big-headed ant are only a relatively weak branch among them, and they will be exterminated and expelled. But it is such a big-headed ant remnant who also brings a lot of valuable technology to the protagonist.

Therefore, to the west, while ensuring their own safety, to contact these advanced races and learn advanced technology, is one of the protagonists' goals.

Instead of being kicked by the enemy in the future, it is better to take the initiative to understand the enemy, learn from the enemy, surpass the enemy, and then kick the enemy's door!