Russian invasion of East Prussia
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Was the Russian invasion of East Prussia in the early phases of World War I.
Chronology
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August 1914: The Russians entered East Prussia on 7-9 August.
August 1914: The Battle of Gumbinnen, started by the Germans, was the first major offensive on the Eastern Front during the First World War.
August 1914: Battle of Stallupönen, fought between Russian and German armies on 17 August 1914, was the opening battle of World War I on the Eastern Front.
August 1914: Movement of Russian troops during the Battle of Tannenberg.
September 1914: The First Battle of the Masurian Lakes in 1914 was a significant military engagement during World War I. It was led by German generals Paul von Hindenburg and Erich Ludendorff, resulting in a decisive victory over the Russian forces and pushing them out of East Prussia.
September 1914: Part of Russia on the border with East Prussia invaded by German forces.
