Here are couple of ways the Apache has been used:
"The Apache operated extensively with close air support aircraft such as the Fairchild Republic A-10 Thunderbolt II and the USMC's McDonnell Douglas AV-8B Harrier II, often acting as a target designator so the Apache could conserve its own munitions."
"During Operation Desert Storm on 17 January 1991, eight AH-64As guided by four MH-53 Pave Low IIIs destroyed a portion of the Iraqi radar network;the first attack of Desert Storm, an act to allow attack aircraft into Iraq without detection."
http://en.wikipedia.org/wiki/Boeing_...tional_history