What battles of World War 1 were the French involved in?

France Mostly in NE France, the Fortress City of Verdun was heavily attacked. Many of the river lines were sites of battles, the Marne, Somme & Aisne amonst others. The trenches were also in Belgium, the British forces generally on the left flank of the French. Effectively there were trenches from the Swiss frontier to the English channel.