The Enzian was a German WWII surface-to-air anti-aircraft missile that was the first to use a radio controlled guidance system. During the missile's development in the late stages of the war it was plagued by organisational problems and was cancelled before becoming operational.
It was named for a genus of mountain flower, in English the Gentian.
As early as 1943 it was becoming clear that Messerschmitt's Me 163 interceptor would be difficult to use in combat. After flying to the altitude of allied bombers, it had only a few minutes to find them and make an attack before running out of fuel. Even if the aircraft did accomplish this, it then had the additional problem of lacking a weapon that could be aimed effectively while closing on the target at some .
Dr. Herman Wurster of Messerschmitt proposed an answer in the form of Flak Rakete 1 (FR-1) in 1943. Instead of tracking down the planes, the rocket would fly just in front of the target and then detonat