Millwall and West Ham met at The Den on 19 September 2026 for their 100th competitive fixture, the first meeting in 14 years. The photo essay documents the matchday atmosphere while exploring how the rivalry grew from shared dockland origins into one marked by intense local identity, hostility and policing.

Both clubs emerged from east London’s heavy industries: Millwall from the docks and West Ham from Thames Ironworks. Although the rivalry is often linked to the 1926 General Strike, historians dispute that explanation, while much of the modern animosity developed from the 1970s onwards amid industrial decline, unemployment and the loss of traditional sources of community identity. Notable disorder followed several later meetings, including a notorious 2009 League Cup tie involving fighting, a stabbing and pitch invasions.