The united states armed forces is composed of five branches of service. in no particular order, these branches of service are
the army, the navy, the air force, the marine corps, and the coast guard. the army is the oldest and largest of the armed forces,
established by an act of the continental congress on july 14, 1775. its main function is to defend american interests and to
enforce american initiatives on land. the navy is the second oldest branch of service, created by order of the continental
congress on october 13, 1775. its mission is to defend american shipping and enforce american initiatives at sea. the marine
corps is by far the most versatile branch of service. originally, the function of the usmc was to defend american ships and board
enemy ships during combat; however, its current function is to operate as an amphibious, rapidly deployed, combined-arms task
force. the air force is the youngest branch of service, established after world war ii from the u. s. army air corps. the air force
defends u. s. air space, provides air support in times of war, operates communications and reconnaissance satellites, and guards
the country's nuclear capability. finally, the coast guard was established in 1780 through an act of the continental congress to
defend america's coastlines, interdict smugglers and pirates, and support american forces in times of war. all branches of service
report to the department of defense, though in peacetime the u. s. coast guard reports to the department of homeland security

what method of organization is used in this essay?