This was partly as a deception measure, and partly because new airbases in Poland could not be completed by 1 June 1941 target date, although they were made ready in time for the actual commencement of Operation Barbarossa on 22 June 1941.
Det var dels en sløring, dels fordi de nye luftbaser i Polen ikke var færdige som planlagt den 1. juni 1941, omend de var klar til Operation Barbarossa den 22. juni 1941.