15 (number)

15 (fifteen) is the natural number following 14 and preceding 16. In English, it is the smallest natural number with seven letters in its spelled name.

In spoken English, the numbers 15 and 50 are often confused because they sound similar. When carefully enunciated, they differ in which syllable is stressed: 15 /fɪfˈtiːn/ vs 50 /ˈfɪfti/. However, in dates such as 1500 ("fifteen hundred") or when contrasting numbers in the teens, the stress generally shifts to the first syllable: 15 /ˈfɪftiːn/.

In mathematics

15 is:

15th (Scottish) Infantry Division

The 15th (Scottish) Infantry Division was an infantry division of the British Army that served with distinction in both World War I and World War II. In the Great War the 15th (Scottish) Division was formed from men volunteering for Kitchener's New Armies and served on the Western Front for three years. The division was later disbanded, after the war, in 1919. In World War II it was reformed as the 15th (Scottish) Infantry Division on 2 September 1939, the day before war was declared, as part of the Territorial Army and served in the United Kingdom and later North-West Europe from June 1944 to May 1945.

First World War

The division was a New Army unit formed in September 1914 as part of the K2 Army Group. The division moved to France in July 1915 and spent the duration of the First World War in action on the Western Front. The division fought in the Battle of Loos, the Battle of the Somme (1916) which included the battles of Pozières and Flers–Courcelette, the Battle of Arras 1917 and the Third Battle of Ypres.