If you are a beginner, I recommend studying just the required liaisons and maybe the forbidden liaison sections, as these are the essentials. 1  If you're more advanced, study all three sections. It may be boring, but your pronunciation and ability to communicate at different levels of formality will improve dramatically.
The United States Navy claims 13 October 1775 as the date of its official establishment, when the Second Continental Congress passed a resolution creating the Continental Navy. With the end of the American Revolutionary War, the Continental Navy was disbanded.
Source: Navy Historical Center. The Marine Corps has had precedence over the Navy since 1921 because the Marine Corps has been very consistent in citing its origins as the legislation of the Continental Congress that established the Continental Marines on 10 November 1775.