The Red Spear Society staged a major uprising in 1928–1929 against the rule of Liu Zhennian, the Nationalist government-aligned warlord ruler of eastern Shandong province in Republican China. Motivated by their resistance against high taxes, rampant banditry and the brutality of Liu's private army, the Red Spear peasant insurgents captured large areas on the Shandong Peninsula and were able to set up a proto-state in Dengzhou county. Despite this, the whole insurgency was eventually crushed by Liu in late 1929.