The USS Franklin D. Roosevelt is a United States Navy aircraft carrier. During the near future insurgent conflict, it carried H.A.W.X. squadron on an assault on a captured offshore oil facility in the Indian Ocean. One week later, Major Alex Hunter used F-35 to launch from the carrier to strike insurgent targets in Africa.
Although none other information has been mentioned in game, it is likely belong to 5th fleet of US Navy according to the mission area.