Argentina is the second largest country in South America located between the Andes mountains and the Atlantic Ocean. It has a population of 41 million people who are mostly of European descent. Spanish is the official language and Roman Catholicism is the dominant religion. Argentina has a diverse geography and culture influenced by European immigration. It has a long history, gaining independence from Spain in the early 19th century and experiencing periods of military rule and economic decline in the late 20th century.