drove more than a hundred excavators to the front line overnight.

They dug between the first and second lines of defense for three days and three nights, and stubbornly dug three huge and steep trenches that were 10 meters long, 20 meters wide, and 10 meters deep.

They dug until the first line of defense was breached, and then they withdrew.

It was because of the buffer of these three steep trenches that the army was able to hold the second line of defense.

You don't know the environment between the two lines of defense at that time...... It was the sound of explosions, the roar of monsters, and the earth.

From time to time, stray bullets and monsters that break through the defenses appear! Alas! Just thinking about it makes me tremble! ”

Wu Ideal gestured while speaking, as if he was present at the scene, which attracted several freshmen next to him to listen attentively.

"They worked continuously for 72 hours in a row under tremendous psychological pressure, risking their lives, with high intensity and high efficiency, and when they drove the excavator to the rear, it was said that the people were all carried down.

Some students' hearing doesn't even return to normal until a month or two later.

Later, the Southwest Provincial Army conveniently awarded them the honorary title of "Iron Army".

Because of that mission, the excavator major of our university is known as the strongest in the country.

But now more than a year has passed, and the juniors and seniors have graduated, and this is the last class of students to participate in that operation. ”

Hearing this description, He Mu also raised his head and looked at the seniors in the distance.

Compared to the sophomores and juniors, this group of young people has amazing maturity on their faces.

At first glance, it was impossible to imagine that this group of people was only one or two years older than the students next to them.

"There is an Immortal in the Book" Iron Army is hitting in his hand, please wait a moment,

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