A Task Force was a provisional (i. e., temporary; non-permanent) unit formed for a particular duty or mission and disbanded upon fulfillment of that duty or mission. Different types of units essential to the mission would be "borrowed" and returned to their parent command(s) upon completion.
A troop ship carried personnel; troops. Cargo ships carried cargo; supplies; materiel of war.
Laguna Nigel is only one of more than thirty records centers nationwide. When you make your appointment to visit the research room be sure to specify what type of records you wish to examine. They may have to order some or all from another center to have them available for you. Good luck!