A quarter of Sudan's population has been displaced from their homes, according to the UN's migration agency IOM.
More than ten million people are counted as internally displaced persons in the country, while more than two million have sought refuge abroad. Most of them have fled to neighbouring countries such as Chad, South Sudan and Egypt.
"Imagine a city the size of London being displaced. That's what it's like, except it's happening with constant threats of gunfire, diseases and brutal violence based on ethnicity and gender," says IOM chief Amy Pope in a statement.
The civil war in Sudan broke out in April last year, when former army and paramilitary Rapid Support Forces (RSF) partners began fighting each other. The capital Khartoum has been heavily affected by the fighting, but the provinces in the Darfur region have simultaneously become the decisive battleground.
Last month, UN agencies warned warring parties of widespread famine and death in large parts of the country if they did not allow humanitarian aid to be let in.
Officially, around 14,000 people have been killed in the conflict, but the actual death toll is feared to be much higher.