In WWII The Germans were desperate to develop anti-bomber weapons. They developed multiple Ground-to-Air rockets. Many were large and complex. The program that received top priority was a simple unguided liquid fueled ground to air rocket named the Taifun. Many were tested with outstanding results. It was fast, cheap to manufacture and accurate. The war ended prior to any operational deployment. Another to little to late weapons system. The US was so impressed by the program, they copied the fundamental design created the Loki surface to air rocket.