Such was the quandary facing soldiers during the Civil War, when going home constituted desertion. Doctors diagnosed 5,000 clinical cases of nostalgia in Union soldiers and determined that 74 men had died from the affliction. To contain the epidemic, military officials prohibited Army bands from playing “Home, Sweet Home,” while ministers and officers avoided references in sermons or speeches that might touch off a new outbreak.

Beware Social Nostalgia - NYTimes.com