V2

In the early 1930s, the German military began seeking out new weapons, which would not violate the terms of the Treaty of Versailles. Assigned to aid in this cause, Captain Walter Dornberger, an artilleryman by trade, was ordered to investigate the feasibility of rockets. Contacting the Verein fur Raumschiffarht (German Rocket Society), he soon came in contact with a young engineer named Wernher von Braun. Impressed with the VfR's work, Dornberger recruited von Braun to aid in developing liquid-fueled rockets for the military in August 1932. He created the A-4, later called the V-2, was a single-stage rocket fueled by alcohol and liquid oxygen. It stood 46.1 feet high and had a thrust of 56,000 pounds. The A-4 had a payload capacity of 2,200 pounds and could reach a velocity of 3,500 miles per hour.  On October 3, 1942 the A-4 was first launched from Peenemunde. Breaking the sound barrier, it reached an altitude of sixty miles. It was the world's first launch of a ballistic missile and the first rocket ever to go into the fringes of space. In 1943 Hitler decided to use the A-4 as a "vengeance weapon," and the group found themselves developing the A-4 to rain explosives on London. Fourteen months after Hitler ordered it into production, the first combat A-4, now called the V-2, was launched toward western Europe on September 7, 1944. Highly interested in the weapon, both American and Soviet forces scrambled to capture existing V-2 rockets and parts at the end of the war. In the conflict's final days, von Braun and Dornberger surrendered to American troops and assisted in further testing the missile before coming to the United States. While American V-2s were tested at the White Sands Proving Ground, Soviet V-2s were taken to Kapustin Yar. Working to develop more advanced rockets, von Braun's team at White Sands used variants of the V-2 up until 1952. The world's first successful large, liquid-fueled rocket, the V-2 broke new ground and was the basis for the rockets later used in the American and Soviet space programs. 

Sources:
- http://inventors.about.com/library/inventors/blrocketv2.htm
- http://militaryhistory.about.com/od/artillerysiegeweapons/p/v2rocket.htm