From the Document: "According to the U.S. Unified Command Plan, the Department of Defense (DOD) document that articulates the division of operational responsibilities amongst the 11 Combatant Commands (CoCOMs), United States Central Command (CENTCOM) has command authority over U.S. forces in the Middle East and West/Central Asia. CENTCOM was formally established by DOD on January 1, 1983. Its area of responsibility (AOR) comprises Egypt, Jordan, Syria, Iraq, Kuwait, Saudi Arabia, Bahrain, Qatar, United Arab Emirates, Oman, Yemen, Iran, Turkmenistan, Lebanon, Uzbekistan, Kazakhstan, Kyrgyzstan, Tajikistan, Afghanistan, and Pakistan. Accordingly, its geography spans more than 4 million square miles and is populated by more than 550 million people from 22 ethnic groups, speaking 18 languages with hundreds of dialects and professing multiple religions that transcend national borders. Headquartered at MacDill Air Force Base (AFB) in Tampa, Florida, CENTCOM is commanded by Marine Corps General Kenneth F. McKenzie, who previously served as the Director of Strategic Plans and Policy in the Joint Staff."
CRS In Focus, IF11428
Congressional Research Service: https://crsreports.congress.gov/