A carrier strike group (CSG) is a type of carrier battle group of the United States Navy, composed of roughly 7,500 personnel. It is a flexible naval force that can operate in confined waters or in the open ocean, during day and night, in all weather conditions. The principal role of the carrier and its air wing within the carrier strike group is to provide the primary offensive firepower, while the other ships provide defense and support. These roles are not exclusive, however. Carrier strike groups are tasked to accomplish a variety of wartime missions, as well as a wide variety of functions in situations short of war. The peacetime mission is to conduct forward presence operations, to help shape the strategic environment, deter conflict, build interoperability with allies, and respond to crises when necessary.

A carrier strike group typically includes the following ships:

• An aircraft carrier, which serves as the flagship of the group and provides air support.
• A guided-missile cruiser, which provides anti-air and anti-surface warfare support.
• Guided-missile destroyers, which provide multi-mission offensive and defensive capabilities.
• A supply ship, which provides logistics support.

The exact composition of a carrier strike group can vary depending on the mission and the assets available.