Iron Current 1937: Under the Nanjing Sky

In 2026, the international situation changed suddenly. A heavy-armed combined brigade unit brought a large amount of supplies and carried out strategic missions on the border. It was swept away by a sudden phenomenon outside Nanjing in 1937. The Zhengzheng National Army abandoned Nanjing and the Japanese army occupied Nanjing. The Synthetic Brigade embarks on a journey of rescue