Plo Koon's fleet, which is also referred to as Plo Koon's armada, constituted a battle group that belonged to the Fourth Fleet. It was commanded by Jedi General Plo Koon during the initial stages of the Clone Wars. After discovering the Separatists' novel clandestine weapon, the heavy cruiser named Malevolence, within the Abregado system, Plo Koon spearheaded his fleet in an assault against the colossal vessel. His fleet, composed of three Venator-class Star Destroyers, inclusive of his flagship known as the Triumphant, sustained damage from an ion cannon strike, which was immediately followed by turbolaser bombardment. At the conclusion of the battle, the fleet suffered complete annihilation, with the exception of a solitary Republic escape pod that housed Koon, Clone Commander Wolffe, Clone Sergeant Sinker, and Boost. These individuals were ultimately saved by General Anakin Skywalker and Ahsoka Tano.
Subsequent to the fleet's demise, the Malevolence met its end during the Battle of the Kaliida Nebula, and Koon was eventually provided with another armada. Plo Koon's fleet was made up of three Venator-class Star Destroyers, notably the flagship, Triumphant.