People bomb

From Turtledove

The "people bomb" was a terrorist tactic introduced by the Mormons during the Second Great War during their rebellion against the United States. It quickly copied by other resistance movements the world over. An individual would strap explosives to their body, go to populated areas, and detonate the explosives, killing themselves and killing or injuring as many people in the area as possible. The success of this the tactic inspired other resistence movements to adopt it, including black guerrillas fighting the Freedom Party in the Confederate States.