They are attacked in the Forest of Galantz by vampiric aliens invisible to special tech weapons but not ordinary eyesight, and all but Sgt. Montgomery Kelly of the forward platoons, sixty-six men, are killed in the skirmish, some by blanket bombing of the area with 'holy napalm', a cross between holy water and fire-retardant gel which destroys the vampires.
The soldiers face an enemy that is invisible to advanced technology but visible to human eyes. The battle results in significant casualties, including those killed by a unique weapon that combines holy water and fire retardant properties.