The African Confederation was a political entity on the continent of Africa on the planet Earth. Its member states included Somalia.
Geordi La Forge was born within the Confederation on February 16th, 2335. (TNG: "Cause and Effect")
Details of this Confederation are unknown, as is how it relates to the United States of Africa mentioned in the semi-official biographies of Uhura.
The novel Losing the Peace by William Leisner first established Somalia to be part of the Confederation, with Mogadishu now a thriving, peaceful metropolis, and the home city of La Forge's family.