The impact of ancient Rome on western civilization cannot be hibernated. Though it has been thousands of years since the reign of the Roman Empire, but the traces are still evident in today's world. Some of the notable impacts can be found in today's architecture, arts, laws, engineering, constructions, languages etc. It is said that the Latin language, which was spoken by the Romans, went as far as Western Europe and many languages emerged from Latin. These languages are called the "Romance languages." They include Spanish, French, Italian, Romanian and Portuguese. As a result of this, over 800 million people around the world speak a Romance language. Rome is also associated with the Catholic church, it is believed that the Romans helped spread Christianity in Europe, and today it is the largest religion in the world.
Sub-Saharan Africa's equatorial area is known as Equatorial Africa. There are 13-14 nations, so I'm guessing you want Ethiopia, Rwanda, Kenya, and Somalia, which are the most well-known. Savannas in the north and south, as well as mountains and tropical rain forests, characterize the landscape.
Islam became part of North African cultures due to the geographical location and due to the spread of refugees from Saudi Arabia and other countries in Asia. North Africa was one of the first countries that Islam spread to other than Asia.