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| | | Drie Grachten - Foremost trench of German Reserve-Infanterie-Regiment No. 215 at Maartje Vaart - 1914/1915 (Source: Malte Znaniecki) | |
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| | | Drie Grachten - Inundations - during WW1 (Source: Eddy Lambrecht) | |
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| | | Drie Grachten - German strongpoint - 1916/1917 (Source: Eddy Lambrecht) | |
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| | | Drie Grachten - Flooded area - 1915/1917 (Source: Eddy Lambrecht) | |
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| | | Drie Grachten - Maartje Vaart - Post WW1 (Source: Malte Znaniecki) | |
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