Chad - Sudan Clash

From afrol News:

The Joint African Union-United Nations Special Representative has warned that the continuing tensions between Sudan and neighbouring Chad remains one of the major obstacles to the peace and security of the troubled Darfur region.

Mr Rodolphe Adada has urged the two neighbours to end hostilities along their border amid fresh accusations by Sudan of air strikes carried out in Umm Dukhum, a West Darfur village on its border with Chad.

The conflict between these two nations helps explain why Sudan has been acquiring military arms from China.