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The River Somme is a waterway located in Picardy, a region in France. It is historically significant as the site of the Battle of the Somme during World War I, one of the deadliest battles in human history.
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The Somme ( UK: /sɒm/ SOM, US: /sʌm/ SUM; French: [sɔm] ) is a river in Picardy, northern France.
The river is 245 km (152 mi) in length, from its source in the high ground of the former Arrouaise Forest [fr] at Fonsomme near Saint-Quentin, to the Bay of the Somme, in the English Channel. It lies in the geological syncline which also forms the Solent. This gives it a fairly constant and gentle gradient where several fluvial terraces have been identified.