This website is all about American Aircraft Carriers and Submarines. It includes the history of both Aircraft Carriers and Submarines. Also, it has information on the current fleet of Aircraft Carriers and Submarines in the United States Navy. Both of these ships are fairly new to naval warfare and defense with the oldest really only starting to be practically used during World War One. Before looking into Submarines and Aircraft Carriers, it is important to define exactly what each is.  Merriam Webster defines the two as follows:

Aircraft Carrier: A large warship equipped to serve as a base for aircraft that can take off from and land on its deck

Submarine: A warship with a streamlined hull designed to operate completely submerged in the sea for long periods, equipped with an internal store of air and a periscope and typically armed with torpedoes and/ or missiles