as far as the United States an her allies are concerned, all of it.
if your a member of the us navy your organization is part of the what
The US Army is not part of the US Navy . EDIT: The Marine Corps is technically part of the Navy
There is no such country as 'Pearl Harbour" and thus there is no 'navy of pearl harbour'. Pearl Harbour is a US harbour in the Hawaiian islands and thus the navy based there is the US Navy and US citizens who want to defend their country will join that navy to do so.
SEa Air and Land
to defend us from stuff like terrorism
Gaining control of the sea surrounding the Guadalcanal area. Translation: Fighting the Japanese navy. Note: The US Marine Corps are part of the US Navy.
The United States spends heavily on the military. More spending leads to more funding on the US Navy: better training, better equipment, better recruitment, and so forth. That is how the US navy can defend other country's challenges.
1955 Eisenhower sent US forces to RVN to help them defend against communist infiltrators. 1964 the North Viet Navy attacked the US Navy in the Tonkin Gulf; the fight was on.
The number of military branches varies by country. In the US the primary four services are the US Army, US Navy, US Air Force and US Marine Corps. The Marine Corps is a part of the Department of the Navy. The US Coast Guard is brought into play during war time as well.
There are plenty of land based jobs in the Navy, but the Navy is a sea-going service, and sailors go to sea. There are few, if any, rates where you're not going to be subject to sea time.
Army, Navy, Air Force, Marines (part of the Navy), and the Coast Guard (part of Homeland Security, formerly part of the Department of Transportation, formerly part of the Treasury Department).
Army and Navy. The Marines were a smaller unit then and a part of the Navy. The Coast Guard was part of the Treasury Department in peace, and part of the Navy in war. The US Army had military pilots, but no equivalent to an air force until after World War 1. [In 1917-18 US pilots flew for the French.]