united_states | leadername | barack_obama <tsp> united_states | capital | washington,_dc <tsp> 1634:_the_ram_rebellion | country | united_states <tsp> united_states | ethnicgroup | african_americans <sep> the united states of america (usa or usa), commonly known as the united states (us or us) or america, is a country primarily located in north america it consists of 50 states, a federal district, five major unincorporated territories, nine minor outlying islands, and 326 indian reservations the united states is the world's third-largest country by both land and total area 
the african americans are an ethnic group in the united states where 1634 the ram rebellion was written. the president in the us is barack obama and the capital city is washington dc.the united states is the world's third-largest country by both land and total area