The international response to crisis in Darfur can be described as the "worst humanitarian crisis" in the world.
EXPLANATION:
The Darfurcrisis is the major armed conflict between the government of Sudan and rebel groups "Sudan Liberation Front" and "Justice and Equality Movement."
This conflict started because the rebel groups accused the Sudan government for oppressing the non-Arab population of the Dafrur region.
The government responded by carrying out an ethnic cleansing which led to the death of hundreds and thousands of civilians.