sentences:  The guns were registered by observation during the first phase of the bombardment.Bruchmüller was awarded the oak leaves to his "Pour le Mérite" on March 26, 1918, one of just two higher artillery commanders decorated this way.Still only a Lieutenant-Colonel and a retired officer on temporary recall, he commanded the artillery in Heeresgruppe Deutscher Kronprinz in the Third Battle of the Aisne and the Second Battle of the Marne.