"FV" fielded strongly competitive sides in the early 1900s until the club briefly split in two with the formation of "TuFV Helvellia Berlin". These two sides were re-united in 1905 but the club was seriously weakened by World War I and nearly disappeared. At the end of the war in 1919 "FV" merged with "Berliner SC 09 Brandenburg" to form "SV Brandenburg Berlin". Another union followed in 1921, this time with "BBC 03 Berlin" to create "BBC-Brandenburg Berlin". Both "Brandenburg" and "Lichterfeld" were playing second-tier football through this period with "SCB" winning promotion to the top-flight for a two-year turn that ended in 1925 after which "BBC" again became an independent side.