May 1943
From The Space Library
A PBY Catalina, fitted with two liquid-propellant JATO rockets developed at Annapolis, took off with 20 Percent reduction in run. Liquid-propellant JATO was abandoned by Navy in 1944.
May-June: Germans operationally test fired over 100 V-2's from Blizna, Poland, launching 10 on one day, only a small number of which were fully successful.