Which geographic combatant commander's AOR does the Fourth Fleet normally fall under?

The Fourth Fleet is responsible for maritime operations in the Caribbean and Central and South America, which falls under the area of responsibility (AOR) of USSOUTHCOM, or United States Southern Command. This command focuses on the Southern Hemisphere and is tasked with enhancing security and stability in the region through joint military operations and partnerships with regional nations.

This AOR includes a diverse range of missions, from humanitarian assistance and disaster response to counter-narcotics operations. The alignment of the Fourth Fleet with USSOUTHCOM allows for a coordinated effort to ensure maritime security and support regional efforts to combat threats, reflecting the strategic interests of the United States in the southern region.

The other commands, while they have significant roles and responsibilities, do not encompass the operational area of the Fourth Fleet. For instance, USEUCOM oversees Europe and parts of the Middle East, USNORTHCOM covers North America, and USPACOM is focused on the Pacific region. Thus, USSOUTHCOM is the correct command associated with the Fourth Fleet’s geographical area of operations.