In Sri Lanka, staggering numbers of young men were killed fighting in the armed forces against Tamil separatists. The war became one of attrition—year after year waves of young foot soldiers were sent to almost certain death in a war so bloody that the very names of the most famous battle scenes still fill people with horror. Alex Argenti-Pillen describes the social fabric of a rural community that has become a breeding ground and reservoir of soldiers for the Sri Lankan nation-state,...