The US Military has approximately 1.3 million active-duty members of the armed forces, with another 865,000 in the reserves.
The Coast Guard is part of the Department of Homeland Security (DHS). It’s responsible for maritime law enforcement, including drug smuggling. It manages maritime search and rescue and marine environmental protection. It also secures ports, waterways, and the coasts. Service members are known as Coast Guardsmen, nicknamed Coasties. The reserve component is Coast Guard Reserve.