British military graves in the Somme region by identification 1915-1918

In total, there are 153,443 British war graves in the Somme department of France, for soldiers who died during the First World War. Approximately 100,000 (65.2 percent) of those buried in these graves have been identified, while 53.4 thousand (34.8 percent) remain unidentified. In addition to these, it is estimated that approximately 107 thousand British soldiers died in the Somme department during the First World War, but have no known grave.
There are 243 British military cemeteries in total in the Somme department; 135 for those who died in the region between 1915 and 1916 (primarily due to the First Battle of the Somme in 1916), 102 for those who died in the region in 1917 and 1918, and six cemeteries made by medical staff much further from the frontlines (known here as "bases").