Which branch of the military is primarily responsible for providing maritime security?

The United States Coast Guard is primarily responsible for providing maritime security. This branch operates under the Department of Homeland Security during peacetime and can be transferred to the Department of the Navy during times of war. The Coast Guard's missions include ensuring the safety of navigation, conducting search and rescue operations, enforcing laws at sea, and protecting the marine environment, all of which fall under the umbrella of maritime security. The Coast Guard's unique capabilities allow it to respond to both domestic and international maritime issues effectively.

While the Navy plays a critical role in naval warfare and protecting U.S. interests at sea, its focus is typically on power projection and engaging in combat operations rather than local maritime security, which includes law enforcement and search and rescue operations. The Army and Air Force, although they might operate in joint missions involving maritime forces, are not primarily responsible for maritime security.