西德, or West Germany, officially known as the Federal Republic of Germany, existed from 1949 until 1990. It was established after World War II, when Germany was divided into two separate states: 东德 (East Germany) and 西德. The capital of West Germany was 波恩, and it was a democratic state with a strong economy, becoming a member of various international organizations, including the 北约 (NATO) and the 欧盟 (European Union). The reunification of Germany occurred in 1990, leading to the dissolution of West Germany. This event marked the end of the Cold War division in Europe. The reunification process involved integrating the economies and political systems of both 东德 and 西德, resulting in a single, unified Germany with 柏林 as its capital.