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This category has the following 8 subcategories, out of 8 total.
- ► Cold War fortifications (8 C, 3 P)
- ► Fortifications of Switzerland built in the 20th century (2 C, 4 P)
- ► Fortified frontiers (3 C)
Pages in category "Fortification lines"
The following 30 pages are in this category, out of 30 total. This list may not reflect recent changes (learn more).