1. FSV Köln 1899

Following the union of the two clubs, VfL took up the place of predecessor SC in the Gauliga Mittelrhein, one of sixteen top flight divisions formed in the re-organization of German football under the Third Reich in 1933. The club was moderately successful there, capturing the division title in 1941 before moving on to take part in the national playoff rounds. They were eliminated in a semi-final match by eventual vice-champions Schalke 04 (4–1) and lost the subsequent third place match to Dresdner SC by the same score. As World War II progressed it forced German football competition to become more local in character and the Gauliga Mittelrhein was broken up. VfL became part of the Gauliga Köln-Aachen and won its second consecutive title there. They were put out of national level competition when they lost a quarterfinal contest to Kickers Offenbach (3–1). The team made appearances in 1939, 1941, and 1942 in early round play for the Tschammerpokal, predecessor to today's DFB-Pokal (German Cup). In 1943, the club became part of the wartime side Kriegspielgemeinshaft VfL 99/Sülz 07 Köln in partnership with SpVgg Sülz 07. The combined side repeated as Gauliga Köln-Aachen champions and were again eliminated in a national quarterfinal, this time by KSG Spielverein/48-99 Duisburg (0–2). VfL resumed play as an independent side following the war, and after a season in the Bezirksliga Rheinbezirk, joined the 2. Oberliga West (II) for the 1950–51 season. The following year the first…

as VfL Köln

Gauliga Mittelrhein (I) champions: 1941 Gauliga Köln-Aachen (I) champions: 1942 as KSG VfL 99/Sülz 07 Köln

Gauliga Köln-Aachen (I) champions: 1943