In March 1937, Falck was appointed adjutant to "Oberstleutnant" Gerd von Massow, the "Geschwaderkommodore" (wing commander) of "Jagdgeschwader" 132 "Richthofen" (JG 132—132nd Fighter Wing). On 1 August 1938, he was appointed "Staffelkapitän" of 8. "Staffel" (8th squadron), a squadron of the newly created III. "Gruppe" (3rd group) of JG 132, which was based at Jüterbog-Damm. On 1 November, III. "Gruppe" was renamed to II. "Gruppe" of "Zerstörergeschwader" 141 (ZG 141—141st Destroyer Wing), a unit which became the I. "Gruppe" of "Zerstörergeschwader" 76 (ZG 76—76th Destroyer Wing) on 1 May 1939. In consequence, Falck commanded the 5. "Staffel" of ZG 141, and later the 2. "Staffel" of ZG 76. Initially based at Pardubitz, present-day Pardubice in the Czech Republic, the "Gruppe" was equipped with the Messerschmitt Bf 110 C-1 heavy fighter. During the prelude of World War II on 25 August 1939 I. "Gruppe" of ZG 76 deployed to an airfield at Ohlau to the southeast of Breslau.