US Navy
The aircraft carrier USS George Washington (CVN 73), center-right, leads the George Washington Carrier Strike Group and Japan Maritime Self-Defense Force ships in tactical maneuver training during Annual Exercise, November 28, 2013.
The US Navy is the most powerful group of ships, carriers, and sailors on Earth.
The Navy is older than the US - founded in 1775 as the Continental Navy - and is currently made up of 430 ships and submarines. It's been involved in more than 10 major wars, and combat has taken the Navy all over the world.
The surface fleet is made up of 16 different classes of vessels, and includes amphibious assault ships, aircraft carriers, command ships, mine sweepers, destroyers, littoral combat ships, and more.
We put together a list of all the types of surface ships in service with the US Navy: