Which service is trained to be first on the scene in response to attacks on the U.S.?

The Marine Corps is trained to be the first on the scene in response to attacks on the U.S. This capability stems from their role as a rapid response force, with a focus on amphibious warfare and versatility in various combat situations. They are specifically organized, equipped, and trained to deploy swiftly, often being among the first military personnel to respond to crises or hostile actions, both in support of national defense and to stabilize situations around the world.

Their unique training allows them to operate in diverse environments, whether from ship to shore or in direct confrontation on land. The Marine Corps has a longstanding tradition of being ready to fight and win quickly, often acting as the initial force against potential threats to U.S. interests. This includes capabilities that allow them to project power rapidly, which is essential for addressing immediate threats or maintaining security.

Other services, while vital in their respective roles, typically do not engage in rapid response in the same way or aren't structured primarily for immediate engagement following an attack. The Coast Guard, for instance, is more focused on maritime law enforcement and search and rescue, while the Army and Navy have broader operational roles that include a range of strategic and logistical engagements but are not exclusively dedicated to immediate response like the Marine Corps.