The US has the largest amphibious force in the world. Two amphibious groups gathered around a ship aircraft carrier, are permanently deployed in the oceans. These amphibious ships have the capacity to carry out landing operations by sea and by air. To this end, they carry more than 2,000 Marines with their aviation consists of thirty helicopters and aircraft short takeoff and vertical landing. With 270 photographs, including 220 color profiles and 6 in B & W.