Answer: France
Some extra relevant information:
The Somme, one of the most infamous battlefields of World War 1, was located in France. Situated along the Somme River, the region saw intense fighting between German and Allied forces from July 1 to November 18, 1916. The battle resulted in significant casualties, with approximately 1.3 million soldiers wounded or killed. Despite the high cost, the Battle of the Somme marked a turning point in the war, as it saw the first large-scale use of tanks and represented the commitment of the Allies to defeating the Central Powers. Today, the Somme battlefield serves as a memorial to those who lost their lives during this brutal conflict.