SudanSudan, officially the Republic of the Sudan, is a country in north-east Africa.Khartoumis the capital and second largest city of Sudan and Khartoum state. It is located at the confluence of the White Nile, flowing north from Lake Victoria, and the Blue Nile, flowing west from Ethiopia.Port Sudanis a port city in eastern Sudan, and the capital of the state of Red Sea.The Nileis a major north-flowing river in northeastern Africa, generally regarded as the longest river in the world. The Nile has two major tributaries, the White Nile and Blue Nile. The White Nile is considered to be the headwaters and primary stream of the Nile itself. The Blue Nile, however, is the source of most of the water and silt.