Two California non-profits are planning to distribute across school districts in California a teacher's resource guide about “comfort women,” the mostly Korean women who were forced into Japanese military-run brothels during World War II.

The guide was commissioned by the Korean American Forum of California (KAFC) and the Comfort Women Justice Coalition (CWJC), which spearheaded the creation and installation of a comfort women memorial in San Francisco in 2017, as part of their efforts to educate the world about this chapter of World War II history in Asia.

“We need to do that in order to make sure that this kind of history will never be repeated again,” Lilian Sing, a retired San Francisco judge and co-chair of the CWJC, said. “And hopefully the historical atrocities like ours, like comfort women, as well as American slavery, the Armenian Genocide and the Holocaust, will never happen again.”

During World War II, an estimated 200,000 women from countries including Korea, the Philippines, China, and Indonesia were forced into sexual slavery and “served” between five to 60 soldiers per day, according to research referenced by professors from Vassar College and Shanghai Normal University.