The Maginot Line was a 450 km long line of fortifications along the French border. What was the German equivalent for that?

Siegfried Line
Rommel Line
Guderian Line
German Defence Line
The original Siegfried Line (German: Siegfriedstellung) was a First World War line of defensive forts and tank defences built by Germany in northern France during 1916–17 as a section of the Hindenburg Line. In English the term "Siegfried Line" commonly refers to the "Westwall", the German term for a similar Second World War-era defensive line built further east during the 1930s opposite the French Maginot Line.
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