(Drawing Sword + War of Resistance + independent development + Republic of China + warlords + special forces)
Every inch of land is soaked in blood; a hundred thousand young men rise to arms.
Xu Hongfei transmigrates into the world of Drawing Sword and obtains a heaven-defying comprehension System.
At this time, civil wars rage within the country, leaving the people in misery.
Foreign powers invade from without, and the nation faces a crisis of survival.
With the country shattered and the Japanese invaders' bayonets slick with blood,
there is only one answer: repay blood with blood. Only by making them fear us can we earn a say in our own fate.
Wow, the protagonist is so awesome when he goes into battle with the system to kill enemies. He is instantly involved.