On 18 August 1870, the Battle of Gravelotte, the biggest battle of the war, took place in Lorraine between the Germans and the army of Marshal Bazaine. The Germans suffered 20,000 casualties and the French 12,000, but the Germans emerged as the victors, as Marshal Bazaine's army, with 175,000 soldiers, six divisions of cavalry and five hundred cannons, was trapped inside the fortifications of Metz, unable to move.