ADD another item to the well-equipped soldier's duffel. An evangelical radio ministry has developed a book kit meant to help soldiers protect their sexual purity, and is raising money to send 6,000 kits to chaplains who have requested them.

The kits, from New Life Ministries, which broadcasts on 150 stations nationally, is intended to promote Bible-based abstinence from pornography, adultery, nonmarital sex and masturbation. "Your goal is sexual purity," the authors write. "You are sexually pure when no sexual gratification comes from anyone or anything but your wife."

The five-book "Every Soldier's Battle" kit, boxed in camouflage, arrives at a time of "increased underlying tension in military chaplaincy," as more chaplains come from evangelical Christian traditions, said David Segal, director of the Center for Research on Military Organization at the University of Maryland. These chaplains often bring a culture of proselytizing, Mr. Segal said, that is "not in consonance with the way the military defines chaplaincy."

"Every Soldier's Battle" began with a call earlier this year to New Life from Michael Music, a chaplain's assistant (official rank: religious program specialist first class), with a Navy unit then in Iraq.