Australia is a developed country and one of the wealthiest in the world, with the world's 12th-largest economy. In 2014 Australia had the world's fifth-highest per capita income. Australia's military expenditure is the world's 13th-largest.
The third largest country of the world, the United States of America is located in North America between Mexico and Canada.
The United States of America (USA), commonly referred to as the United States (U.S.) or America, is a country composed of 50 states, a federal district, five major self-governing territories, and various possessions.