Editing Limes (Roman Empire) (section)

=== Britain===
{{Main|Gask Ridge||Antonine Wall|Hadrian's Wall|Stanegate|Fosse Way|Limes Britannicus}}
{{Unreferencedsect|date=December 2023}}
[[File:Gask Ridge Limes 85 n. chr.png|thumb|Gask Ridge Limes 85 AD]]
[[File:Roman.Britain.north.155.jpg|thumb|Map of forts and walls in North Britain around 155 AD (most forts on and south of [[Hadrian's Wall]] have been omitted)]]

The frontier in Britain existed from the 1st to the 5th century AD. Initially the Fosse Way road was a frontier. From the 1st to the 2nd century first the Gask Ridge and then the Stanegate, with their chains of forts and watchtowers, marked the northern boundary of [[Britannia]]. Later [[Hadrian's Wall]] was built as the frontier and for a short time the [[Antonine Wall]] further north. The defence of Hadrian's Wall was achieved through the incorporation of [[castra|forts]] and ''[[Castellum|castella]]''. Security and monitoring on the coasts in the west and southeast were achieved by forts and by chains of watchtowers or signal towers, both along the coastline.

The garrisons, ''Exercitus Britannicus''{{cn|date=February 2024}}, consisted mostly of [[cohort (Roman)|cohorts]] of [[auxilia]]. The strategic reserve comprised three [[legion (Roman)|legions]] based in [[Eburacum]] (York), [[Isca Silurum]] and [[Chester|Deva]]. The observation and surveillance of the waters around the British Isles was the responsibility of the ''[[Classis Britannica]]'', whose headquarters were in ''[[Rutupiae]]'' (Richborough). Legions, auxilia and the fleet were commanded by the provincial governors. From the 3rd century, units of ''[[comitatenses]], [[limitanei]]'' and ''[[liburnaria]]'' (marines) came under the command of two generals:{{cn|date=February 2024}}

* ''[[Comes Britanniarum]]''
* ''[[Dux Britanniarum]]''
{{clear}}