Mountains and Rivers Never Bow Their Heads

Lin Ye, the leader of the special operations squadron in the 21st century, travels through the era of supreme martial chaos. The human race has been fighting among themselves for hundreds of years. The alien coalition invaded, half of the country fell, and the human race was on the verge of extinction. There is no cheating, no fighting for the realm, he uses special warfare tactics as his blade and his heart to defend the territory as his shield, builds bases, trains the iron-blooded army, joins forces vertically and horizontally, stops internal fighting, and drives away foreign enemies! Use mortal wisdom to shake the sky of martial arts; fight with iron and blood to guard the mountains and rivers of the human race!