Military branches : Army, Navy and Marine Corps, Air Force, and Coast Guard. (Coast Guard administered in peacetime by the Department of Homeland Security but in wartime reports to the Department of the Navy)
Military manpower - military age : 18 years of age (2003 est.)
Military manpower - availability : males age 15-49: 73,597,731 (2003 est.)
Military manpower - fit for military service : NA
Military manpower - reaching military age annually : males: 2,116,002 (2003 est.)
Military expenditures - dollar figure : $276.7 billion (FY99 est.)
Military expenditures - percent of GDP : 3.2% (FY99 est.)
Military - note : 2002 estimates for military manpower are based on projections that do not take into consideration the results of the 2000 census.

TRANSNATIONAL ISSUES
Disputes - international : prolonged drought in the Mexico border region has strained water-sharing arrangements; 1990 Maritime Boundary Agreement in the Bering Sea awaits Russian Duma ratification; maritime boundary disputes with Canada at Dixon Entrance, Beaufort Sea, Strait of Juan de Fuca, and around the disputed Machias Seal Island and North Rock; The Bahamas have not been able to agree on a maritime boundary; US Naval Base at Guantanamo Bay is leased from Cuba and only mutual agreement or US abandonment of the area can terminate the lease; Haiti claims Navassa Island; US has made no territorial claim in Antarctica (but has reserved the right to do so) and does not recognize the claims of any other state; Marshall Islands claims Wake Island.
Illicit drugs : consumer of cocaine shipped from Colombia through Mexico and the Caribbean; consumer of heroin, marijuana, and increasingly methamphetamine from Mexico; consumer of high-quality Southeast Asian heroin; illicit producer of cannabis, marijuana, depressants, stimulants, hallucinogens, and methamphetamine; money-laundering center.