Template:Campaignbox Somme 1916

NOTES:
 * 1) List of Battles and Secondary Actions comes from British Nomenclature for the Battle of the Somme: Refer Battle of the Somme for transcribed list
 * 2) Where pages already exist and are called "Battles" rather than engagements, actions or "capture of", the original page name was moved when the article was completed
 * 3) Full Secondary Action list added as red-links, most written by 1 November 2014
 * 4) Revised headings according to Record of Battles and Engagements, James 1924; two red links to go
 * 5) Simplified list consistent with other boxes