What wars happened in Haiyang before liberation?

/subview/9 172/5 133590 . htm？ Fr = Aladdin

The rise of mine warfare. In Shandong Province, Haiyang militia did not invent and use mines at the earliest time, but in practice, Haiyang militia invented and manufactured dozens of kinds of mines. Haiyang mine warfare is the most famous in Shandong Province, which played a great role in War of Resistance against Japanese Aggression and the War of Liberation.