page_title: Battle of Messines (1914)
section_title: Flanders terrain
hierarchical_section_title: Battle of Messines (1914) / Prelude / Flanders terrain
caption_attribution_description: English: Diagram: topography of the Arras-Lens area showing ridge lines
context_page_description: The Battle of Messines was fought in October 1914 between the armies of the German and British empires, as part of the Race to the Sea, between the river Douve and the Comines–Ypres canal.
context_section_description: The North-east of France and the south-west Belgium were known as Flanders. West of a line between Arras and Calais in the north-west, lay chalk downlands, covered with soil sufficient for arable farming. East of the line, the land declines in a series of spurs into the Flanders plain, bounded by canals linking Douai, Béthune, St. Omer and Calais. To the south-east, canals ran between Lens, Lille, Roubaix and Courtrai, the Lys river from Courtrai to Ghent and to the north-west lay the sea. The plain was almost flat, apart from a line of low hills from Cassel, east to Mont des Cats, Mont Noir, Mont Rouge, Scherpenberg and Mont Kemmel. From Kemmel, a low ridge lay to the north-east, declining in elevation past Ypres, through Wytschaete, Gheluvelt and Passchendaele, curving north and then north-west to Dixmude, where it merged with the plain. A coastal strip about 10 miles (16 km) wide was near sea level and fringed by sand dunes. Inland the ground was mainly meadow, cut by canals, dykes, drainage ditches and roads built up on causeways. The Lys, Yser and upper Scheldt had been canalised and between them the water level underground was close to the surface, rose further in the autumn and filled any dip, the sides of which then collapsed. The ground surface quickly turned to a consistency of cream cheese and on the coast troops were confined to roads, except during frosts.
  The rest of the Flanders Plain was woods and small fields, divided by hedgerows planted with trees and cultivated from small villages and farms. The terrain was difficult for infantry operations because of the lack of observation, impossible for mounted action because of the many obstructions and difficult for artillery because of the limited view. South of La Bassée Canal around Lens and Béthune was a coal-mining district full of slag heaps, pit-heads (fosses) and miners' houses (corons). North of the canal, the city of Lille, Tourcoing and Roubaix formed a manufacturing complex, with outlying industries at Armentières, Comines, Halluin and Menin, along the Lys river. With isolated sugar beet and alcohol refineries and a steel works near Aire-sur-la-Lys, the intervening areas were agricultural, with wide roads on shallow foundations and unpaved mud tracks in France, narrow pavé roads along the frontier and in Belgium. In France, the roads were closed by the local authorities during thaws, to preserve the surface and marked by Barrières fermėes signs, which were ignored by British lorry drivers. The difficulty of movement after the end of summer absorbed much of the local labour on road maintenance, leaving field defences to be built by front-line soldiers.
caption: Topography of the Arras–Lens area showing ridge lines
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