Complex sentence: Battle of the Somme commonly refers to the major Anglo-French offensive in 1916 during the First World War; however, the post-war Battles Nomenclature Committee divided this campaign into a series of battles (listed in the article above).
Split into simpler sentences: Battle of the Somme commonly refers to the major Anglo-French offensive in 1916 during the First World War. The post-war Battles Nomenclature Committee divided this campaign into a series of battles (listed in the article above).