2-319. The likelihood of weapons of mass destruction being employed by an enemy is significant during large-scale combat operations, particularly against critical friendly mission command nodes, massed formations, and critical infrastructure. Commanders balance the need to mass effects against the requirement to concentrate forces and ensure as much dispersal as is tactically prudent to avoid presenting lucrative targets for enemy weapons of mass destruction. Army units must train effectively to operate under CBRN conditions. Operating during CBRN contamination should be a training condition, not simply a task.