Sultan Nasir-u Din Mehmud's armies in Delhi are defeated by Timur.

The Tughlaq dynasty was the third dynasty to rule over the Delhi Sultanate in medieval India. Its reign started in 1320 in Delhi when Ghazi Malik assumed the throne under the title of Ghiyath al-Din Tughluq and ended in 1413.

Timur, also known as Tamerlane, was a Turco-Mongol conqueror who founded the Timurid Empire in and around modern-day Afghanistan, Iran, and Central Asia, becoming the first ruler of the Timurid dynasty. An undefeated commander, he is widely regarded as one of the greatest military leaders and tacticians in history, as well as one of the most brutal and deadly. Timur is also considered a great patron of art and architecture, for he interacted with intellectuals such as Ibn Khaldun, Hafez, and Hafiz-i Abru and his reign introduced the Timurid Renaissance.

December 17 is the 351st day of the year in the Gregorian calendar; 14 days remain until the end of the year.