JV-44 operational record from Wiki;
By 14 March 1945 JV 44 had taken delivery of its first Me 262. JV 44's improvised training programme continued into late March. A Kette of 3 Me 262s led by Oberst Steinhoff mounted the first combat mission by JV 44 in late March, Steinoff claiming a Soviet Il-2 shot down.
General der Flieger Koller issued orders for JV44 to relocate to southern Germany in order to operate in the defence of the aircraft manufacturing plants and fuel and ammunition storage facilities in the area. Thus the unit was on the move constantly as the Allied ground forces advanced, including short stays at Munich-Riem, Salzburg-Maxglan, Ainring (Platzschutz) and Innsbruck, also allegedly using converted Reichsautobahn roadbeds serving as improvised highway strips in early 1945, eventually surrendering at the end of the war. Nearly all the aircraft were destroyed, including some deliberately blown up as Allied troops advanced. A number of aircraft however survived the war and were tested extensively by the United States.
Surviving records suggest the unit shot down approximately 47 Allied aircraft during April/May 1945. Oberstleutnant Heinz Bär was the unit top claimant with 16 kills, while Hauptmann Georg-Peter Eder claimed at least 12. Galland himself claimed 7 kills before being wounded in action.
On 26 April 1945 Adolf Galland was shot down and was wounded in the knee. Temporary command of the unit was then given to Bär. Whilst in hospital Galland devised a plan to prevent the JV 44 pilots and aircraft from falling into Russian hands or being accidentally destroyed by approaching Allied ground troops. He discharged himself from hospital and set up his headquarters in Tegernsee. Still in contact with Heinz Bär he obtained an Fi 156 "Storch" liaison plane.
On May 1 Galland drafted a note to forward to General Eisenhower requesting a special surrender be granted to JV 44. Two aides, Maj. Wilhelm Herget and Capt. Hugo Kessler, flew the Fi 156 across the lines, landing at Schleißheim. The two aides were interviewed regarding the possibility of this surrender. They returned to Galland with instructions on how the surrender would proceed, including handing over the remaining Me 262 aircraft into American hands. The significance of this is that the SS, if they had known of this offer by Galland, might have destroyed the aircraft and executed the associated personnel. Though the aides returned to Galland and he prepared a response, as the Fi 156 Storch returned over the American lines the aircraft was shot down by an American armored column near Schleißheim. Though Herget survived the crash Galland's response did not get to the Americans.
American troops advanced on the JV 44 base near Salzburg and shortly before surrendering, the remaining Me 262's were blown up by JV 44 personnel, grenades being inserted into the engine intakes. Some of the JV 44 Me 262s were earlier flown out to Innsbruck where they met JV 44 personnel under command of Oberst Hans Ekkehard Bob, who was ordered to prepare the Innsbruck airfield for operations.