When the world was at war, I stood as a bulwark, yet many forget the price of my existence. What am I?

Category: History · Difficulty: expert

Hint: This fortification was designed to protect a nation from invasion.

Answer

The Maginot Line

Explanation

The Maginot Line was a defensive fortification built by France, ultimately rendered obsolete by Germany's tactics in World War II.

This is a expert history riddle — one of the harder riddles here. The answer is The Maginot Line.

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