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[archduke ferdinand](<img src="https://ietp-web-cdn-eandt-legacy.azureedge.net/magazine/2014/06/images/640_brodie-trenches.jpg" alt="Image result for ww1"/>)
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[Battle of Tannenberg](https://www.worldatlas.com/articles/major-battles-of-world-war-i-ww1.html]
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