Women are most affected by the Anglophone crisis which erupted in Cameroon in 2017, according to a report published by the International Crisis Group (ICG) on Wednesday.
About 60% of internally displaced people are women and children, the report said.
Many of them are also victims of torture and sexual abuse.
The military and armed separatists’ groups use rape as a weapon of war, the report added.
The ICG said the government should also intensify efforts to prosecute perpetrators of sexual violence.
It also said separatists should indefinitely suspend school boycotts and refrain from coercing women into support roles in militia camps.