Complex sentence: The Oubangui-Chari territory was merged with the Chad colony in 1906, and in 1910 it became one of four territories of the Federation of French Equatorial Africa, (with Chad, Middle Congo and Gabon).
Split into simpler sentences: The Oubangui-Chari territory was merged with the Chad colony in 1906. In 1910, it became one of four territories of the Federation of French Equatorial Africa, (with Chad, Middle Congo, and Gabon).