Defense line

The Victoria Lines, a line of fortification in Malta built to divide the sparsely populated north of the island from the densely populated south
Reconstruction of a Scythian defense line built around 339 BC in modern-day Hungary

A defense line or fortification line is a geographically recognizable line of troops and armament, fortified and set up to protect a high-value location or defend territory, which is an "area of defense".[1]

A defense line may be based on natural difficult terrain features, such as rivers or marshes, mountain ranges, or coastlines; temporary field fortification works such as trenches; and/or more permanent fortifications such as fortresses and bunkers.

For the offensive army, the goal is to attack or "breach" the weakest part, "the easiest way to split the defense line and move to the depth of defense.[1]

List of defense lines

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Derbent Walls

Some notable defense lines include:

Historical[a]

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Modern

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Notes

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  1. ^ Where given, dates in parentheses indicate when construction began.

References

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  1. ^ a b Military Thought, Volume 12. Voennaya mysl (Russia). 2003. pp. 54, 60, 70. Retrieved November 19, 2025.