Answer: to carry out aerial attacks on London, England.
The V-2 was the world's first long-range guided ballistic missile. It was developed by Germany during WWII, and its main mission was to attack Allied cities as retaliation for the bombings of German cities. From September 1944 on, the V-2 was used against London, and then Antwerp. An estimated 2,754 civilians were killed in London by V-2 attacks, while another 6,523 were injured.