Vicious Circle

Vicious Circle is a side challenges in Commander's Challenge.
==Briefing==
Commander Giles seemed a little distressed after you abruptly ended his partnership with Commander Vera, so now he is off sulking in Central America, trying to act important from behind a desk. We didn't mean to push him out of the fight altogether, so why don't you provoke him into another little scuffle? Besides, it will give you an opportunity to square off against one of the new mercenary squadrons working for the Allies in the area. Defeat them and one of our finest new aircraft will be yours.
==Background==
Giles tells the Commander that his Harbingers will fly across and bombard his base sitting on the big mainland near Giles' two bases. FutureTech orders their Commander to get the Harbinger from him before Giles can have the chance to bomb FutureTech's base to rubble. The Commander destroys the two bases and Giles was left stammering for sure that left FutureTech to steal the last of the Allied Air Force's finest unit in the air.
==Tips==
* Giles' Harbingers approach in a very timid manner. Place your AA defenses nearer towards Giles' mainland base to keep them off you.
* Capturing Giles' costal base will allow you freedom of the seas, and more importantly resources, to stage a two pronged attack on his remaining fortress.
* Be sure to use Apollo Fighters, MiG, or Jet Tengus to clear the air for your attacking ground forces. He should fall pretty quickly.