Scotland’s role in the battles of the Great War cost the country more than 105,000 men. In all, around 750,000 Scottish men fought in World War I. There were many reasons for signing up. Solders may have been motivated by patriotism, others drawn by the promise of a military wage - while some would have been carried along by peer pressure. But in the volunteering period between 1914 and early 1916, Scotland provided a disproportionate number of soldiers. A new documentary from Scottish filmmakers is now looking at one of the most important battles in Scotland’s history, which also became infamous as one of the bloodiest, ending the lives of an estimated 18,000 Scots.