The mecha is more than ten meters high, and the soldiers and insects are only a little more than three meters high, and when Yu Nan and the others approached the swarm of soldiers and insects, the attack radar in the mecha had quickly locked on to the nerve nodes of a large number of insects and began to fire.

When the three mechs rushed into the insect swarm, the mecha team led by Yu Nan began to quickly rush towards the tank insects surrounded by soldiers and insects.

On the wall, thousands of officers and soldiers witnessed the furious scene of the mecha team, the assault gun in Yu Nan's hand was fired without missing a shot, and a huge war knife five meters long was waved in his left hand, and every soldier insect that approached him would be cut off.

Beckie's firepower mecha was full of weapons and roared, the Vulcan cannon swept forward, the plasma cannon and missiles on his shoulder whistled out and shattered the tank worm without missing a shot, and the support mecha on the other side was also constantly strafing, from the city wall, the three mechs were like harvesters crossing a wheat field, and a wide trench was a wide one.

At the same time, the jumping insects flying in the sky wanted to attack the mecha team, but Rex on the top of the mountain in the distance no longer sniped the tank insects on the ground, his muzzle kept swinging, and the electronic sight locked on the jumping insects at high speed, as long as the jumping insects close to the mecha team would be knocked down.

In five minutes, the assault gun in Yu Nan's hand had been replaced by fifteen magazines, and his mecha magazine had been emptied, as for the supplies, there were no supplies here.

Berge's Vulcan cannon and missiles were also fully fired, and only a spare set of ammunition was still on the high ground, and she shouted loudly over the intercom:

"Sir, we're running out of ammunition, so we're going to have to evacuate."

Yu Nan looked at the results of their battle just now, and swept all the way, with only the maximum amount of ammunition carried by the three mechas, they had killed thousands of soldiers and insects and more than ninety percent of the tank insects, as for Rex, who had the most ammunition, he alone knocked down most of the jumping insects from the air.

Without the advantage of firepower, the army of soldiers and insects at this time could not enter the inner wall even if they rushed into the outer wall, and the dense bullets of tens of thousands of troops would beat the insects into a sieve even if they could not hit the vital point.

Yu Nan took a look and said:

"The battle footage has been recorded, you evacuate quickly, if you need to, I will notify you to come to support, if I don't give the order, you will stick to the mecha forward base."

Bo Ji and Sibo used the remaining ammunition to fight and retreat, Yu Nan put the assault gun on his back, changed his right hand to the combat knife, and let out a low shout, and the four-legged mecha rushed towards the nearest tank worm with full power.

Wielding a long knife like a windmill to cut everything around, the stumps and fragments of countless insects were swept up by the knife wind, and when they reached the side of the tank bug, Yu Nan burst out, and the long knife fell rapidly, and the head of the tank bug, which was the size of a car, was cut off with a pop.

"Kill."

In the burst of cheers, Yu Nan seemed to have returned to San Francisco in the biochemical world, he was surrounded by 100,000 zombies, using knives when he had no bullets, using sticks when he had no knives, and using fists if he had no weapons, killing, killing constantly, killing in various ways, and killing endlessly.

A long knife with a touch of green blood rising from the east to the west, southeast to north, any creature in front of the mecha will be cut off, the insects are not afraid, Yu Nan does not have the slightest mercy, both sides are constantly impacting, but behind the mecha are one after another insect corpses.

The last tank bug was cut in two, Yu Nan quickly looked around, there were still countless bugs, he shook his head and drove the mecha towards the base and thought secretly:

"It's useless to kill 10,000,000, so many insects are useless with just a few mechas, unless it's a group battle, or you have to have a hundred or ten people like me, to ensure that you can resist the Zerg army."

No matter how powerful a person is, Yu Nan can't wipe out all the army of soldiers and insects, and it is already good to be able to destroy the powerful tank insects of the Zerg.

Quickly rushed to the vicinity of the high wall of the base, and the soldiers around quickly cleared the soldiers and insects to open a road, and when they reached the wall, Yu Nan controlled the mecha to jump to the wall, and the four claws grabbed the wall and climbed up.

When he got to the wall, Yu Nan parked the mecha on a platform, and then opened the hatch and asked loudly:

"Where's Lieutenant Colonel Barnes?"

"Here."

Barnes in the crowd ran over as he answered, and when he saw Yu Nan, he, as a senior officer, actually took the initiative to salute and said:

"Thank you so much, these unlucky bugs are really countless, now that you're here, what should we do to see how we are?"

Yu Nan also hurriedly returned the salute, he carefully observed, the quality of the army was not bad, everyone was fighting with all their might, he nodded and said:

"Shrinking the defense is a last resort, now the tank bugs and jumping worms of the Zerg have been almost wiped out, even if they still have tank bugs and jumping worms, it is too late to attack this place, how many people are still in the current army, how about the weapons and ammunition?"

Barnes beckoned to a statistician, questioned the statistician, and hurriedly said:

"There are 230 small nuclear bombs, 113 missiles, 150,000 mines, 100,000 high-explosive grenades, 700 machine guns, 1.5 billion rounds of ammunition, 20 million rounds of assault rifle ammunition, and due to the massive destruction of assault vehicles, there are still 50 spare plasma cannons, an additional 13,000 rounds of flares, and other daily necessities are sufficient.

"Seventeen thousand people have been killed and wounded?" Yu Nan frowned and said.

Barnes nodded and said:

"The first and second waves of active attacks lost more than 7,000 people, and they were broken by the Zerg hundreds of times in a row on the wall, each time there were dozens of casualties, if it weren't for your high-speed sweep just now that disrupted the formation of the Zerg and caused them to be confused, and we took the opportunity to retreat to the inner wall, our losses would have been even greater."

Yu Nan looked at the soldiers and insects that were still densely packed from outside the outer wall and said:

"How about the high explosives that I let be installed on the exterior walls?"

Barnes says:

"It's all ready, it's up to you when you need it."

Yu Nan looked at the sky, now the surroundings of the base had begun to darken, thousands of searchlights illuminated the surroundings, and within the line of sight, the inner and outer walls had been filled with constantly impacting soldiers and insects.

Yu Nan nodded and said:

"Explode now, fire 1,000 flares per hour, keep it until dawn, take out the mines and grenades, open the mines and throw them at the soldiers, as for the small nuclear bombs and missiles as emergency use, and the other 50 plasma cannons are installed at high places to attack the swarm of soldiers and insects."