UnitedStates Navy (also known as USN or the U.S. Navy) is the branch of the UnitedStates armed forces responsible for conducting naval operations.
The UnitedStates went to war in 1846 against Mexico and the Navy contributed by instituting a blockade, assisting the American takeover of California, and participating in the U.S. military's first large-scale amphibious operation at Vera Cruz.
UnitedStates naval aviation fully came of age in World War II, when it became clear following the Attack on Pearl Harbor, the Battle of the Coral Sea, and the Battle of Midway that aircraft carriers and the planes that they carried had replaced the battleship as the greatest weapon on the seas.
The United Kingdom is bordered to the south by the English Channel, which separates it from continental Europe, to the east by the North Sea, and to the west by the Irish Sea and the Atlantic Ocean; the only land border is between Northern Ireland and the Republic of Ireland.
The climate of the United Kingdom is mild relative to its latitude.
The British sovereign is head of state and as such is, in law, the head of the executive, an integral part of the legislature, head of the judiciary, the commander-in-chief of the armed forces of the Crown, and the “supreme governor” of the established Church of England and the Church of Scotland.