A carrier strike group (CSG) is a type of operational formation in the US Navy that is composed of roughly 7,500 personnel. The principal element of a CSG is a nuclear-powered aircraft carrier, which provides the primary offensive firepower. Other ships in the strike group provide defense and support, and these roles are not exclusive. The ships in a carrier strike group can vary depending on the operational tasking, but typically include:

• Guided missile cruiser: This ship is responsible for air defense and can launch Tomahawk cruise missiles.

• Anti-submarine warfare ships: These ships are responsible for detecting and tracking submarines and can launch anti-submarine warfare helicopters.

• Guided missile destroyers: These ships are multi-mission surface combatants that can launch Tomahawk cruise missiles and provide air defense.

• Support ships: These ships provide logistics and maintenance support to the strike group.

As of March 2023, there are 11 carrier strike groups in the US Navy. The composition of a carrier strike group can vary depending on the specific mission and tasking, but the aircraft carrier is always the principal element of the group.