During the Second World War, the United States Navy and Marine Corps learned the importance of having specialized ships and equipment for getting troops ashore on hostile territory. This requirement has held true over the decades since and the United States has invested considerable money into ensuring it has the ships capable of inserting and supporting forces in hostile areas. From 1989 to 2009, the eight ships of the Wasp class were commissioned into service at the cost of around $750 million each. In addition to its 1200 crew, these amphibious assault ships can carry nearly 1900 marines, dozens of assault craft, helicopters, tanks and armored assault vehicles. In addition to supporting operations in the Middle-East and Asia, ships of the Wasp Class have taken part in humanitarian missions and disaster relief.