World War I has been studied extensively by historians of France and for good reason. Waging the first industrial war required mobilizing all of France's resources, whether military, political, economic, cultural, or imperial. Politicians from the left and the right joined forces to govern the country, priests and seminarians were drafted into the army, factories were retooled to produce armaments and other war material, and women and children were enlisted to do their part. So too were colonial subjects. More than 500,000 men from France's empire fought in Europe for the French Army, while another 200,000 colonial subjects labored in France's wartime workplaces. The human losses were staggering and the political, economic, and cultural reverberations long-lasting, both in the metropole and in the colonies. More than 1.3 million French soldiers and an estimated 71,000 colonial soldiers lost their lives, leaving behind approximately 1.1 million war orphans and 600,000 war widows.