When World War I began in 1914, soldiers faced a novel problem. In the chaos on and off the battlefield where precise timing was integral to routines, communications, and synchronizing attacks, reliable and accurate timepieces were vital. Many officers had pocket watches, but these had many shortcomings on the battlefield. They were cumbersome to pull out and to open the protective lid with gloved hands, requiring officers to pause their duties. The dials were impossible to read at night and the glass crystals broke easily. In a setting where a second could be the difference between life and death, it was clear that an alternative was needed. Thus, in the muddy trenches of the First World War, the wrist-watch was born.