A powder keg is a

barrel A barrel or cask is a hollow cylindrical container with a bulging center, longer than it is wide. They are traditionally made of wooden stave (wood), staves and bound by wooden or metal hoops. The word vat is often used for large containers ...

gunpowder Gunpowder, also commonly known as black powder to distinguish it from modern smokeless powder, is the earliest known chemical explosive. It consists of a mixture of sulfur, charcoal (which is mostly carbon), and potassium nitrate, potassium ni ...

. The powder keg was the primary method for storing and transporting large quantities of black powder until the 1870s and the adoption of the modern cased cartridge. The barrels had to be handled with care, since a

spark Spark commonly refers to: * Spark (fire), a small glowing particle or ember * Electric spark, a form of electrical discharge Spark may also refer to: People * Spark (surname) * Jessica Morgan (born 1992; formerly known as Spark), female singe ...

or other source of heat could cause the contents to

deflagrate Deflagration (Lat: ''de + flagrare'', 'to burn down') is subsonic combustion in which a pre-mixed flame propagates through an explosive or a mixture of fuel and oxidizer. Deflagrations in high and low explosives or fuel–oxidizer mixtures ma ...

. In practical use, powder kegs were small casks to limit damage from accidental explosions. Today they are valued as

collectible A collectable (collectible or collector's item) is any object regarded as being of value or interest to a collector. Collectable items are not necessarily monetarily valuable or uncommon. There are numerous types of collectables and terms t ...

s. Specimens of early American

keg A keg is a small cask used for storing liquids. Wooden kegs made by a cooper were used to transport nails, gunpowder, and a variety of liquids. Nowadays a keg is normally constructed of stainless steel, although aluminium can be used if it is ...

s for gunpowder are found in sizes like tall by diameter and tall by diameter, often with strappings of reed or sapling wood rather than metal bands to avoid sparks. Kegs for blasting powder used for mining or quarrying were often larger than kegs for shipping and storing powder for

firearm A firearm is any type of gun that uses an explosive charge and is designed to be readily carried and operated by an individual. The term is legally defined further in different countries (see legal definitions). The first firearms originate ...

As metaphor

A powder keg is also a

metaphor A metaphor is a figure of speech that, for rhetorical effect, directly refers to one thing by mentioning another. It may provide, or obscure, clarity or identify hidden similarities between two different ideas. Metaphors are usually meant to cr ...

for a region that political, socioeconomic, historical or other circumstances have made prone to outbursts. The

analogy Analogy is a comparison or correspondence between two things (or two groups of things) because of a third element that they are considered to share. In logic, it is an inference or an argument from one particular to another particular, as oppose ...

is drawn from a perception that certain territories may seem peaceful and dormant until another event triggers a large outburst of

violence Violence is characterized as the use of physical force by humans to cause harm to other living beings, or property, such as pain, injury, disablement, death, damage and destruction. The World Health Organization (WHO) defines violence a ...

. The term is most often used to simplify and help the understanding of what is often a complex set of circumstances that lead to conflicts, such as the

powder keg of Europe The powder keg of Europe or Balkan powder keg was the Balkans in the early part of the 20th century preceding World War I. There were many overlapping claims to territories and spheres of influence between the major European powers such as the Ru ...

. While the term can be used to designate the entire region of Europe, it is often used specifically to refer to the

Balkans The Balkans ( , ), corresponding partially with the Balkan Peninsula, is a geographical area in southeastern Europe with various geographical and historical definitions. The region takes its name from the Balkan Mountains that stretch throug ...

, due to its role in the

Balkan Wars The Balkan Wars were two conflicts that took place in the Balkans, Balkan states in 1912 and 1913. In the First Balkan War, the four Balkan states of Kingdom of Greece (Glücksburg), Greece, Kingdom of Serbia, Serbia, Kingdom of Montenegro, M ...

and

World War I World War I or the First World War (28 July 1914 – 11 November 1918), also known as the Great War, was a World war, global conflict between two coalitions: the Allies of World War I, Allies (or Entente) and the Central Powers. Fighting to ...

. The most cited event attributed to the use of the term was the

assassination of Archduke Franz Ferdinand The assassination of Archduke Franz Ferdinand was one of the key events that led to World War I. Archduke Franz Ferdinand of Austria, heir presumptive to the Austria-Hungary, Austro-Hungarian throne, and his wife, Sophie, Duchess of Hohenberg ...

Sarajevo Sarajevo ( ), ; ''see Names of European cities in different languages (Q–T)#S, names in other languages'' is the Capital city, capital and List of cities in Bosnia and Herzegovina, largest city of Bosnia and Herzegovina, with a population of 2 ...

Condominium of Bosnia and Herzegovina A condominium (or condo for short) is an ownership regime in which a building (or group of buildings) is divided into multiple units that are either each separately owned, or owned in common with exclusive rights of occupation by individual own ...

in 1914, the immediate trigger of World War I.

References

External links

* Causes of war Containers English-language idioms Gunpowder {{Mil-hist-stub