Short answers, pulled from the story.
The Three Alls Policy was a Japanese scorched earth strategy formalized in early 1941 by General Ryūkichi Tanaka. This plan targeted suspected guerrilla base areas with extreme force to transform regions into unpopulated zones where no resistance could survive.
Historian Mitsuyoshi Himeta estimated that more than 2.47 million Chinese civilians died due to this policy. Communist records showed base area populations dropping from 44 million to 25 million people while Max Hastings wrote that several million civilians perished under these campaigns.
In July 1942, Japanese forces destroyed 128 dikes across Hebei Province. The flooding impacted 6,752 villages and displaced 2 million civilians who faced immediate execution or forced labor conscription.
General Yasuji Okamura issued new orders on the 9th of July 1941 titled the Three Alls Operation. His strategy involved burning villages and constructing containment walls along railways to isolate guerrilla fighters from civilian populations completely.
Young women faced systematic sexual violence including gang rape at the edge of a village on Hainan Island on the 14th of December 1943. Pregnant women had their stomachs opened to rip out fetuses and children were thrown from heights to their deaths.