Yemen’s ongoing civil war is often represented as being purely about control over the country. However, due to historical grievances, much of the South would prefer outright secession. As the war drags on, these secessionists are likely to gain influence, and could cause a return to the pre-1990 world of two Yemens.
Given the failure of this summer’s ceasefire, it seems likely that the current conflict in Yemen will continue for the foreseeable future.