The U.S. Navy and the U.S. Marines are two distinct branches of the United States Armed Forces. While both branches are responsible for defending the country, they have different roles and responsibilities. The Navy is a sea-based branch that is responsible for the defense of the United States as well as its interests abroad. This includes air, land, and sea-based operations, as well as a number of specialized capabilities such as intelligence gathering, logistics, and search and rescue. The Marines, on the other hand, is a land-based branch that is primarily responsible for conducting amphibious operations and land-based operations. The Marines are a smaller branch than the Navy, but they are highly trained in amphibious warfare and are often the first to deploy in times of conflict.