Sudan sits at the confluence of the Blue Nile and White Nile in northeastern Africa, where the two rivers meet at Khartoum to form the Nile proper. The country extends from the Red Sea coast in the east, which runs approximately 670 kilometers, across desert zones including the Nubian Desert and Bayuda Desert, to the Nuba Mountains in the south-central region. Jebel Marra, a volcanic massif in Darfur, reaches approximately 3,042 meters and marks Sudan's highest point. The Atbara and Dinder rivers flow as seasonal tributaries into the main Nile system. After South Sudan's separation in 2011, Sudan's territory encompasses roughly 1.86 million square kilometers, making it the third-largest country in Africa by area.
The population stands at approximately 46 million as of 2023 estimates, though precise census data remains limited due to ongoing conflict and displacement. Arabs and Arabized Nubians form the largest demographic groups, concentrated along the Nile valley and in Khartoum. The Beja people inhabit the Red Sea coastal region and eastern desert. Fur, Zaghawa, and Masalit populations predominate in Darfur. Nuba groups occupy the Nuba Mountains of South Kordofan. Arabic serves as the official language, while regional languages include Beja, Fur, Nubian dialects, and dozens of others. Sunni Islam constitutes the religion of the overwhelming majority, introduced through trade and conquest beginning in the 7th century CE. Sufi orders maintain significant presence, particularly visible in Omdurman where weekly gatherings occur at Hamed al-Nil Mosque.
The Kingdom of Kush emerged in Nubia by approximately 2500 BCE, initially as a vassal to Egypt before establishing independence around 1070 BCE. Kushite rulers conquered Egypt in the 8th century BCE under Piye, establishing the 25th Dynasty. Taharqa ruled as pharaoh from approximately 690 to 664 BCE, controlling territory from the Mediterranean to the confluence of the Blue and White Niles. After Assyrian invasions forced retreat from Egypt, the Kushite capital moved south to Meroe around 590 BCE. The Meroitic civilization persisted until approximately 350 CE, developing its own writing system and constructing more than 200 pyramids at royal necropolises including Meroe, Nuri, and El-Kurru. These pyramids stand smaller and steeper than Egyptian counterparts, with typical heights between 6 and 30 meters. Jebel Barkal, a sandstone butte rising 98 meters from the Nubian Desert near Karima, functioned as a sacred site for both Egyptian and Kushite rulers who built temples at its base.
Christian Nubian kingdoms succeeded Meroe after the 6th century CE. Makuria, centered at Old Dongola, repelled Arab Muslim invasions in the 7th century through military campaigns that resulted in the Baqt treaty around 652 CE, which maintained relative peace for nearly six centuries. Gradual Arab migration, intermarriage, and trade shifted the region toward Islam and Arabic language by the 15th century. The Funj Sultanate, established at Sennar in 1504, controlled much of central Sudan until 1821 when Muhammad Ali of Egypt invaded and incorporated Sudan into Egyptian administration. Ottoman-Egyptian rule, known locally as the Turkiyah, lasted until 1885.
Muhammad Ahmad proclaimed himself the Mahdi in 1881 on Aba Island in the White Nile, initiating a revolt against Egyptian rule. Mahdist forces captured El Obeid in 1883 and Khartoum in January 1885 after a siege that killed British General Charles Gordon. The Mahdist State controlled Sudan until 1898 when an Anglo-Egyptian force under Lord Kitchener defeated Abdullah al-Taashi, the Mahdi's successor, at the Battle of Omdurman in September 1898. British and Egyptian forces killed approximately 10,000 Mahdist soldiers in a single day using Maxim guns against spear and rifle-armed warriors.
The Anglo-Egyptian Condominium governed Sudan from 1899 to 1956 as a joint colonial enterprise, though Britain exercised effective control. Separate administrative systems developed for northern and southern regions, restricting movement between them. Ali Abdel Latif founded the White Flag League in the 1920s as an early nationalist organization demanding Sudanese self-determination. Political parties emerged in the 1940s, including the Umma Party led by Sayyid Abd al-Rahman al-Mahdi (grandson of the Mahdi) and the National Unionist Party favoring union with Egypt. Ismail al-Azhari became the first prime minister in 1954 of a transitional government. Sudan declared independence on January 1, 1956.