A vast , landlocked nation roughly three times the size of California , Chad has struggled to absorb hundreds of thousands of refugees who flooded across its border with the Darfur region of Sudan , where ethnic warfare rages .
Sudan
Darfur
/location/location/contains
Sudan
Darfur
/location/country/administrative_divisions
Darfur
Sudan
/location/administrative_division/country
LOCATION
California
LOCATION
Chad
LOCATION
Darfur
LOCATION
Sudan