Sudan’s catastrophic civil war and severe humanitarian crisis have entered a new phase as the military battles former allies-turned-rebels for the strategic control of Khartoum. Reporting from the frontline with his colleagues Ivor Prickett and Abdalrahman Altayeb, The New York Times’s Africa chief correspondent, Declan Walsh, details the fierce struggle for the bridges over the Nile and its tributaries that divide the Sudanese capital.

The M23 militia is ruling over a vast stretch of territory in the eastern part of the Democratic Republic of Congo, threatening the sovereignty of the biggest country in sub-Saharan Africa.