In concert with the Yellow Attacks at Puron Ridge , the Greens launch Operation Cottonmouth to breakthrough the Violet Line . Spearheading this assault , is the 4th Green Armored Division and 39th Green Infantry Division .Opposing them is the Purple 28th Combat Zone ( 3 Militia Battalions and 2 army regiments ). The strength of these attacks would lead to the collapse of the norther Purple Defenses .