Catterick Garrison is a major Army

Army

An army An army An army (from Latin arma "arms, weapons" via Old French armée, "armed" (feminine), in the broadest sense, is the land-based military of a nation or state. It may also include other branches of the military such as the air force via means of aviation corps...

 base located in Northern England

Northern England

Northern England, also known as the North of England, the North or the North Country, is a cultural region of England. It is not an official government region, but rather an informal amalgamation of counties. The southern extent of the region is roughly the River Trent, while the North is bordered...

. It is the largest British Army

British Army

The British Army is the land warfare branch of Her Majesty's Armed Forces in the United Kingdom. It came into being with the unification of the Kingdom of England and Scotland into the Kingdom of Great Britain in 1707. The new British Army incorporated Regiments that had already existed in England...

 garrison in the world with a population of around 12,000, plus a large temporary population of soldiers, and is larger than its older neighbour
Catterick

Catterick, North Yorkshire

Catterick , sometimes Catterick Village, to distinguish it from the nearby Catterick Garrison, is a village and civil parish in the Richmondshire district of North Yorkshire, England...

 (also known locally as Catterick Village). It is said to be the largest army base in Europe

Europe

Europe is, by convention, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally 'divided' from Asia to its east by the watershed divides of the Ural and Caucasus Mountains, the Ural River, the Caspian and Black Seas, and the waterways connecting...

It is not a single fenced base, but several separate barracks around which a town has developed.