Attack Plan Macedonia is an attack plan taught at Camp Half-Blood. Percy Jackson, Grover Underwood, and Clarisse La Rue performed this when they attacked the Cyclops, Polyphemus, in The Sea of Monsters.
To carry out Attack Plan Macedonia, one person attacks from in front of the enemy while two others attack on both sides (one from the left, the other from the right). The objective is to surprise the enemy and to make sure he won't be able to fight the three at the same time giving the attackers the advantage to defeat the enemy. This battle plan works better when there are large numbers of people attacking.