International Group of the Durruti Column

The International Group (Spanish: Grupo Internacional) was a detachment of foreign volunteers that fought in the Spanish Civil War as part of the Durruti Column. First established by French anarchists who had gone to fight on the Aragon front in August 1936, it grew to include members from throughout Europe and North America, with groupings being formed by French and German fighters. The group was almost whiped out in the battle of Perdiguera in October 1936, during which its commander Louis Berthomieu was killed. It was then transferred to the Madrid front and later back to the Aragon front, where it underwent militarisation.

Its members consisted of a mix of people from various different left-wing factions, who disagreed on how the militarisation process ought to take place. Despite objections, it was ultimately reorganised into the International Company of the Spanish Republican Army's 26th Division and later renamed to the International Workers' Association Battalion. When the group refused to take part in an offensive against Quinto, it was disbanded and its members transferred to the International Brigades. Many of its members later took part in the resistance to Nazi Germany in World War II.