a tactical air mission which did not normally involve the direct support of friendly ground forces. It may of may not involve a FAC depending on the circumstance. (In my entire year in the A-1, except for SAR missions, I never struck a target without coordination with either a ground or airborne FAC.)
the attack of lines of communication to disrupt supply flows and if possible isolate specific zones or enemy forces therein] [preventing transportation of supplies, equipment and troops past a particular point or along some route, especially through the use of air power to destroy bridges, railway junctions, etc.