Mauritania

Sahara desert

Eritrea

Mali

Niger

Sudan

Chad

Sahel

Nigeria

Burkina

Faso

Senegal

2,000 km

2,000 miles

Sahara desert

Eritrea

Mauritania

Mali

Niger

Chad

Sudan

Sahel

Nigeria

Senegal

Burkina

Faso

1,000 km

1,000 miles