The two forces in the northeast contain each other, and the Terrans have been giving them food and other material support because Baiyun City has been giving them food and other materials, so the relationship between the two parties is not bad, so the remaining main force should be more than enough to cooperate with the lizardmen and orcs to defend the city, and if there is really a crisis at that time, the dwarves in the city and the Yanyun iron cavalry trained on the western grassland are enough to hold out until the Yang army's reinforcements.

In Baiyun City, Yang Bing has absolute authority, and the thief with his orders is naturally unimpeded, and the combat troops and the people accompanying the army are quickly assembled at the entrance of the underground world, ready to go, Yang Bing immediately waved his hand, with the poisonous fly as the guide, and the whole army slowly drove into the hole.

Only when you are really underground, can you feel the hardships and hardships of underground combat, just the dim light of the underground makes Yang Bing's entire army strength greatly reduced, and the range of the archers is compressed by more than half, at this time, Yang Bing begins to miss the original pile of harpys that were exterminated by themselves, the harpy is an authentic underground race, at this time, if there is a harpy as a scout, it can definitely make the survivability of the entire army go to a higher level.

Knowing the current situation, Yang Bing would never do anything to exterminate the harpy in order to please a few wood elves, but there is no regret medicine to take in the world, and Yang Bing's army can only slowly march underground with the torches in his hands.

When he walked through this long passage and really entered the underground world, Yang Bing suddenly found that the situation was not as bad as he thought, and the underground was not a pitch black with no fingers in sight, and the mosses scattered on the stones, the ground, and the top of his head were simply ubiquitous, and they emitted wisps of fluorescence and brought a trace of light to the underground world.

If you hadn't seen it with your own eyes, you would never believe that this mysterious underground world was like this, in front of you was an extremely huge hole, there was no edge in sight, there was rubble everywhere, and if it weren't for the stone wall above your head, this place would be more like a wilderness on the ground.

Not far away, there is even an underground river that flows into the distance, and its source is a nearby waterfall that cascades from the top of a 100-meter cave.

The entrance to the cave behind Yang Bing and the others was located at the bottom of a towering cliff, which stretched straight to the top of the cave, and it seemed extremely small for a person to stand here.

The first time he entered this underground world, Yang Bing did not order the team to move forward rashly, the previous thief reported that there were many underground creatures, and then if it was an underground battle, the strength of the human race had no advantage, and the overall combat idea of Yang Bing entering the underground this time was to defend as an attack, step by step, steady and steady, and slowly advance.

The poisonous flies of the army were sprinkled out by Yang Bing to monitor the surrounding situation, and the halberd soldiers and archers discharged an arc-shaped defensive line at the entrance of the cave to defend against attacks that could occur at any time, while the people of the army were all dispatched, relying on the entrance of the cave to set up a camp, this passage is so far, the only passage that has been found to connect the ground and underground, and Yang Bing must always be on guard against underground creatures to disturb Baiyun City when leading the army to conquer the underground.

At the same time, all kinds of materials to support the underground conquest army had to be transported from above, and a safe place was needed to store them, so a strong camp was especially important for the army, and militarily it was a bridgehead and forward base.

At the same time as the advance base was erected, a group of people also started the stone collection work next to the camp, many buildings in Baiyun City are waiting for the arrival of the stone, and the earlier the stone is started, Yang Bing's strength will be stronger, and he will have a little more bargaining chips for victory.

The advance base began to step up construction, the second thief went out with a few thieves for a long time but has not come back to report, it seems that the area of this underground world is really not small, but there is no war, and the army can't stay idle here, idle for a long time is a big blow to morale, just at this time sent out to guard around a small thief came back to report, and found a cave (cave) tribe not far ahead.

The cave (cave) people are the first-order soldiers of the dungeon camp, they have no eyes, just like snakes, they only rely on sensing infrared rays to survey the surrounding environment, so the strength of the light has no effect on them, and they are also typical underground creatures, but their combat effectiveness is really low, and they have always been enslaved in the underground forces.

The number of the cave (cave) people tribe found is roughly five hundred, although the number may have exceeded the total strength brought out by Yang Bing this time, but Yang Bing does not think that these cave (cave) people, this kind of soft persimmon that can be twisted can set off much storm.

Leaving half of the halberdiers and archers to guard the advance base, and the poisonous cangs to protect the newly built quarry, Yang Bing only took half a sentry of halberdiers and half a sentry of archers, and directly pushed to the discovered cave (cave) tribe.

After the change of the invincible world of heroes, those wild soldiers are not standing there rigidly like before, as long as no one provokes them, they will not move in their old age, and the current wild soldiers are no different from normal creatures, they also have all kinds of needs, and the original coalition army attacked Baiyun City for food is an obvious example.

The cave tribe that Yang Bing was going to attack also had the special surname of a social creature, and each individual had a clear division of labor, some were responsible for fighting, some were responsible for collecting food, some were leaders, some were led, some were elderly, some were children, and of course there were males and females.

In the underground world, the range that the cave (cave) people can survey is better than that of humans, and when Yang Bing can only see the outline of the cave (cave) tribe with dim light, the cave (cave) people have already discovered his army, and it has caused chaos among the cave (cave) tribe at the moment.

In the underground world, the cave snowmen have always been in the role of being bullied, and over time they have become accustomed to this positioning, so before they can figure out the strength and purpose of the sudden appearance of the army this time, the cave blood tribe will naturally sweep away.

By the time Yang Bing's team drove into the land of the Cave Blood Tribe, looking at the chaotic scene in front of him, Yang Bing was already a little unsure whether he was facing a first-order soldier in the dungeon camp or a peasant who had completely changed his skin.

Just when Yang Bing was hesitating whether to concentrate his full strength on attacking the Cave Blood People tribe directly, or to disperse his forces to surround them, preparing to capture more prisoners, he finally opened a fairly formed army from the chaotic tribe.

The dozen or so cave blood people led by the cave blood people are very different from ordinary cave blood people in appearance, the skin tones of ordinary cave blood people are mainly turquoise and brown green, they are in a pot, with a small tail behind them, and the smooth head only has a mouth and no eyes, and the dozen or so cave blood people who came out in rows are red like blood, and there is a row of bone spurs from the neck to the tail, Yang Bing can see at a glance that these guys are their advanced troops, the Hell Cave Blood People.

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