From propaganda to protest, music has always been an important element of war. In our darkest hours, music has the ability to remind us of our humanity. Military drummers once charged into battle, unarmed, to rally troops, demoralize the enemy, and send messages with their instruments. Throughout history, soldiers have sung ballads to remember the fallen and boost morale. And yet, while music is an effective tool in the promotion of military unity, it has also been used to segregate female soldiers in Israel and Russia.