The
Japanese had stuck a stick in the vagina of this woman after raping her.
This child lost an arm. 
After
raping pregnant women, the Japanese soldiers cut open their abdomen and
took out the foetus, thus murdering two lives at the same time.
The heads of the victims are hung
up
and treated like playthings.
See the three Chinese characters
in the poster?
The meaning of this phrase is:
THE
BIG SLAUGHTER