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 
in the united states the leader is barack obama. the capital city is washington d.c. african americans are an ethnic group and is where 1634 the ram rebellion was written.the united states is the world's third-largest country by both land and total area