Central Europe Germany Italy Spain (Spanish Civil War) Albania Austria Baltic states Belgium Bulgaria Burma China Czechia Denmark France Germany Greece Italy Japan Jewish Luxembourg Netherlands Norway Poland Romania Slovakia Spain Soviet Union Yugoslavia Germany Italy Netherlands Portugal Spain Sweden Switzerland United Kingdom United States The Iron Front (German: Eiserne Front) was a German paramilitary organization in the Weimar Republic which consisted of social democrats, trade unionists, and democratic socialists.

The Three Arrows, originally designed for the Iron Front, became a well-known social democratic symbol representing resistance against monarchism, Nazism, and communism during the parliamentary elections in November 1932.

[2] The Iron Front was formed on 16 December 1931 in the Weimar Republic by the Social Democratic Party (SPD), along with the Allgemeiner Deutscher Gewerkschaftsbund (ADGB), the Reichsbanner Schwarz-Rot-Gold, and workers' sport clubs.

The SPD rallied to the Iron Front, held mass demonstrations, armed themselves, and fought the Nazi SA and Communist RFB in the streets.

[5] In response to the formation of the Iron Front, the KPD founded its own activist wing, Antifaschistische Aktion (Antifa), which opposed the social democrat SPD and the fascist NSDAP.

[8] Until the mid 1930s and in some cases until the war years, some local branches of the Iron Front and the former trade union organisations continued with resistance, mostly by spreading leaflets, organizing secret meetings, and carrying out acts of sabotage.

[2] The Iron Front flag has been adopted by supporters of MLS teams including the Portland Timbers and the Seattle Sounders frequently seen at their games.