The Ottoman Empire under Selim I defeats the Mamluk Sultanate and captures present-day Egypt at the Battle of Ridaniya.

The Ottoman Empire, also called the Turkish Empire, was an imperial realm that controlled much of Southeast Europe, West Asia, and North Africa from the 14th to early 20th centuries; it also controlled parts of southeastern Central Europe, between the early 16th and early 18th centuries.

Selim I, known as Selim the Grim or Selim the Resolute, was the sultan of the Ottoman Empire from 1512 to 1520. Despite lasting only eight years, his reign is notable for the enormous expansion of the Empire, particularly his conquest between 1516 and 1517 of the entire Mamluk Sultanate of Egypt, which included all of the Levant, Hejaz, Tihamah and Egypt itself. On the eve of his death in 1520, the Ottoman Empire spanned about 3.4 million km² (1.3 million sq mi), having grown by seventy percent during Selim's reign.

The Mamluk Sultanate, also known as Mamluk Egypt or the Mamluk Empire, was a state that ruled Egypt, the Levant and the Hejaz from the mid-13th to early 16th centuries, with Cairo as its capital. It was ruled by a military caste of mamluks headed by a sultan. The sultanate was established with the overthrow of the Ayyubid dynasty in Egypt in 1250 and was conquered by the Ottoman Empire in 1517. Mamluk history is generally divided into the Turkic or Bahri period (1250–1382) and the Circassian or Burji period (1382–1517), called after the predominant ethnicity or corps of the ruling Mamluks during these respective eras.

The Battle of Ridaniya or Battle of Ridanieh was fought on January 22, 1517, in Egypt. The Ottoman forces of Selim I defeated the Mamluk forces under Al-Ashraf Tuman bay II. The Turks marched into Cairo, and the severed head of Tuman bay II, Egypt’s last Mamluk Sultan, was hung over an entrance gate in the Al Ghourieh quarter of Cairo. Or, alternatively, he was hung from the gate and buried after three days. The Ottoman grand vizier, Hadım Sinan Pasha, was killed in action.