Towards the end of World War II the United States Navy built 558 Landing Ship Medium (LSM) type vessels across three classes. They were originally designed under the classification Landing Craft Tank - Mark 7 but were reclassified after exceeding 200 feet in length.

NAM Atlântico Landing platform helicopter (LPH) is a term used by some navies to denote a type of amphibious warfare ship designed primarily to operate as a launch and recovery platform for helicopters and other VTOL aircraft. As such, they are considered a type of helicopter carrier.

USS Iwo Jima (LPH-2) was the lead ship of her class and type and the first amphibious assault ship to be designed and built from the keel up as a dedicated helicopter carrier.

USS Inchon (LPH-12) anchored in Haiphong Harbor, North Vietnam, 20 June 1973, while participating in "Operation End Sweep".

The Amphibious Assault Ships were designed to transport fully equipped Marine Assault Troops into combat areas and land them by helicopter at designated inland points.

The Iwo Jima class amphibious assault ships of the US Navy were the first amphibious assault ships designed and built as dedicated helicopter carriers, capable of operating up to 25 helicopters to carry up to 1,800 marines ashore.

INFO - Iwo Jima class Amphibious Assault Ship / LPH LPH 2 USS Iwo Jima (1961) LPH 3 USS Okinawa (1962) LPH 7 USS Guadalcanal (1963) LPH 9 USS Guam (1965) LPH 10 USS Tripoli (1966) LPH 11 USS New Orleans (1968) LPH 12 USS Inchon (1970)

In August 1990, two weeks after the initial deployment of troops to the Persian Gulf for Operation Desert Shield, Iwo Jima (LPH 2) became the first amphibious assault ship to deploy to that area,...

The America class (formerly the LHA (R) class) is a ship class of landing helicopter assault (LHA) type amphibious assault ships for the United States Navy (USN).

USS New Orleans (LPH-11) was an Iwo Jima-class amphibious assault ship in the United States Navy. She was the third Navy ship to be so named, and is the first named for the Battle of New Orleans, which was the last major battle of the War of 1812.