 "Sonderstab W." was responsible for collecting and analyzing the tactical lessons of the Spanish Civil War.Lützow wrote up his report, "Erfahrungsbericht Winterausbildung 1937/1938, Jüterbog-Damm, 5.Staffel" (field report winter training 1937/1938, Jüterbog-Damm, 5th squadron) documenting his Spanish experiences and tactical proposals.