I Take My Knowledge to World War II and Develop a Futuristic Warfare System

Liu Yu transmigrates to Blue Star and discovers that this world's understanding of warfare hasn't advanced beyond the era before World War II.

Here, inventing a rifle that uses preloaded cartridges ranks among the world's top 100 greatest inventions.

Inventing a radio ranks among the world's top 50 greatest inventions!

So Liu Yu arrives with the warfare doctrine of the 21st century.

"I get taken out without even seeing the enemy?"

"How are we supposed to fight this war?"

"I want to report someone for cheating in the war simulation System!"

"Longhua's tactics are too ruthless!"