A strike package is a group of aircraft with different capabilities that are launched together to perform a single attack mission.
The term is normally applied to ground attack missions, where the strike package for attacking the primary target will include bombers, fighters to defend them from enemy aircraft, wild weasels to defend against ground-based anti-aircraft weapons, reconnaissance aircraft for pre-raid and post-raid reconnaissance and tanker aircraft to extend the mission radius.
AWACS and stand-off jamming aircraft may support the strike package without entering the most dangerous airspace.
The strike package tactic gives up continuous air/ground operations over a target area in favor of discontinuous presence.
This leaves periods of little air threat and thus relatively good freedom of movement to the opposing ground forces.