The Unified Command splits on Africa go back to the day when USCINCSTRIKE/MEAFSA (the CENTCOM grandaddy) covered the AO. The 3-way split today (as it was in my day) divides the area, disrupts command, and diverts funds. Commands are typically loath to give up portions of their AOs regardless of interest because the size of the AO drives allocation of funds.

As for C2 it really gets interesting in the case of ops like Support Hope where USEUCOM and USCENTCOM controlled portions of the pie--coupled with the issues of working with USTRANSCOM as the supporting command. All of this then works to confuse ops when overlayed against other agency divisions along geographic lines, especially State and AID, with individual country missions underneath.

As for radical Islam in Africa, the proverbial fat lady has not yet taken the stage. The vast wealth that certain regions on the continent hold have been masked somewhat by the overlay of war, corruption, and crippling poverty. In particular Nigeria with its oil and the Congo with its minerals are relevant examples. Islam is making greater inroads overtime; Somalia is a relevant case. Lebanese connections throughout Africa are strong, especially in the Congo and its diamond/gold sector.

My take on the idea of a command for Africa is that it would be good for no other reason that it would retain the funding allocated to it rather than have it shifted to other priorities within a larger, broader command.

best
Tom