The United States and Germany have not always been allies. The two countries were on opposing sides during World War I and World War II. However, in the aftermath of World War II, the United States and Germany became close allies. The United States provided significant economic aid to Germany through the Marshall Plan, which helped to rebuild the German economy. The United States also helped to establish a democratic government in Germany. In return, Germany became a strong supporter of the United States in the Cold War. The United States and Germany have remained close allies ever since.