War of Resistance: Soldiers Rise, I Can Upgrade My Entries!

Jiang Yu traveled back to the Anti-Japanese War and became a guerrilla on the battlefield. At this time, artillery roared on the battlefield, bullets flew everywhere, and it was a critical moment of life and death. As a social animal who traveled through peacetime, how could he survive? Fortunately, he has awakened the entry upgrade system. As long as he can upgrade his entries, he can continue to become stronger. In an emergency, he upgraded [Firearm Shooting (White) to [Firearm Shooting (Purple)] As a result, Jiang Yu transformed into a battlefield gunner, firing every shot without missing a beat. The Japanese soldiers fell under his gun one after another. On the battlefield, he picked up various entries by killing the Japanese soldiers. After these entries were integrated and upgraded, Jiang Yu became stronger and stronger, and the Japanese soldiers he fought were frightened by the news.