The purpose of an amphibious assault is to land and reinforce ground forces on enemy territory with the aid of an amphibious assault ship, a sort of amphibious warfare ship. The style changed from aircraft ships that were transformed into helicopter carriers (and, as a result, are often mistaken for conventional fixed-wing aircraft carriers). Modern ships typically have a good deck and can support amphibious landing craft. In a full circle, certain amphibious assault ships now serve as secondary aircraft carriers for V/STOL fixed-wing aircraft. The duty of an amphibious assault ship is fundamentally different from that of a regular aircraft carrier: instead of supporting strike aircraft, its aviation facilities are mostly used to house helicopters to support forces on land. Some, however, are capable of performing the sea-control function, boarding aircraft like the Harrier or the new F-35B variant of the Lightning II fighters for combat air patrol and helicopters for anti-submarine warfare, or acting as a secure base for a significant number of STOVL fighters operating in air support for an expeditionary unit on land. Most of these vessels can transport or support landing craft, including air-cushioned hovercraft and LCUs. The United States Navy runs the largest fleet of these kinds of vessels, which includes ships from the Wasp class, which debuted in 1989, and the remarkably identical America class, which debuted in 2014. The Brazilian Navy, the Chinese People's Liberation Army Navy, the Egyptian Navy, the Royal Australian Navy, the French Navy, the Italian Navy, the Republic of Korea Navy (South Korea), and the Spanish Navy all employ amphibious assault ships. Amphibious assault ship is a phrase that is frequently used to refer to many types of ships. This rule applies to all large-deck amphibious ships, including the landing platform helicopter (LPH), landing helicopter assault (LHA), and landing helicopter dock