ヴェルダン条約
The Oaths of Strasbourg were a military pact made on the 14th of February, A.D. 842 by Charles the Bald and Louis the German against their older brother Lothair I, the designated heir of Louis the Pious, the successor of Charlemagne. One year later the Treaty of Verdun would be signed, with major consequences for Western Europe's geopolitical landscape.