I am looking for information about the Werfergranate 21. Att he moment I have very limited sources at home and in th library, and I can find very little on the Internet. What I am especially looking for: 1. When was it first used? I have several dates: May 21, 1943 (Reported by the 303rd Bomb Group. They saw air to air rockets fired for the first time.) August 17, 1943: Several sources. Heinz Knoke writes in his book that he put them on his plane on Aug 15 for the first time and used them on Aug. 17. October 14, 1943: Some sources. One of them is Martin Middlebrook in The Schweinfurt-Regensburg Mission. He wrote that there were most likely no rocket attacks on the Aug. 17 mission. The reports may refer to the Oct 14 mission. What is the truth? 2. Which units used the W.Gr 21? I have JG 1 and 26, but also ZG 26 and 76, JG 11, JG 7, JV 44 and the Sturmjäger. JG 1 and 26 were the first units to use them? 3. Tactics. How were they used? I think Knoke fired from the front (I imagine at around 10 o'clock), but I have also read that they were fired from 6. 4. Sturmstaffel 1 and Sturmgruppen: Did they use the W. Gr. 21? And do you have a good image in color of the "Whites of Their Eyes" insignia? Signed, Magnuzk.