Governments are represented by ambassadors appointed by the president and confirmed by the Senate. They serve at the pleasure of the president and can be replaced at any time. Wherever there is an ambassador there is an American embassy, a building where the ambassador and his team do business. The embasies of each country are treated as the national soil of the country represented. In counries where the US doesn't have a lot of business the government is represented by a consulate headed up by a counsel. These "substations" do the same thing as embassies in dealing with the locals and helping Americans in the countries where they are located.