I had the Second Battle of the Somme(1918). This occurred during WWI and was fought on the Western Front from the end of the summer, in the basin of the Somme River. It was a counter-offensive in response to the German Spring Offensive. Between the 'Allie' and the Germans.
A key part of the German supply line ran parallel with the front. This second 1918 battle around the Somme was part of a strategy designed to push parts of the German line back behind this main supply line so cutting it and making the efficient maintenance of the German forces on the front, impossible. The campaign began with battle of Bapaume and, starting shortly after, the Battle of Saint-Mihiel, outside the Somme area, with the aim of reducing salients before using the fluidity of the broken line to press on to the strategic railway. This policy worked but it took some very determined work at the St. Quentin Canal, among the prepared defences, to achieve success.
Sources
http://en.wikipedia.org/wiki/Second_Battle_of_the_Somme_(1918)
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