The current German state, called the Federal Republic of Germany, was founded in 1949 in the wake of Germany's defeat in World War II. At first, it consisted only of so-called West Germany, that is the areas that were occupied by British, French, and American forces. In 1990, five new states, formed from the territories of East Germany—the former Soviet zone, which in 1949 became the German Democratic Republic (GDR)—were incorporated into the Federal Republic of Germany. Since that time, Germany has consisted of sixteen federal states: Baden-Württemberg, Bavaria, Berlin, Brandenburg, Bremen, Hamburg, Hesse, Lower Saxony, Mecklenburg-West Pomerania, North Rhine-Westphalia, Rhineland-Palatinate, Saarland, Saxony, Saxony-Anhalt, Schleswig-Holstein, and Thuringia.
Location and Geography. Shortly after the unification of East and West Germany in 1990, the Federal Republic signed a treaty with Poland, in which it renounced all claims to territories east of the boundary formed by the Oder and Neisse rivers—the de facto border since the end of World War II.
Demography. In accordance with modern European patterns of demographic development, Germany's population rose from about 25 million in 1815 to over 60 million in 1914, despite heavy emigration. The population continued to rise in the first half of this century, though this trend was hindered by heavy losses in the two world wars. In 1997, the total population of Germany was 82 million. Of this sum, nearly 67 million lived in former West Germany, and just over 15 million lived in former East Germany. In 1939, the year Germany invaded Poland, the population of what was to become West Germany was 43 million and the population of what was to become East Germany was almost 17 million. This means that from 1939 to 1997, both the total population and the population of West Germany have increased, while the population of East Germany has decreased.
Following World War II, the population of both parts of Germany