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 XV International Brigade was one of the International Brigades formed to fight for the Spanish Republic during the Spanish Civil.

[citation needed] At the end of March, a Spanish battalion, Voluntario 24 (the 24th Volunteers), joined the brigade.

[citation needed] The XVth International Brigade included African Americans in fully integrated units, unlike what was allowed in the U.S. Army in the 1930s.

[7][8] During the autumn of 1937, the units of the International Brigade were consolidated into the Spanish Popular Army and the Battalions were re-numbered.

B. S. Haldane,[10] American singer and activist Paul Robeson traveled to Spain in 1938 to bolster the Republican cause.

[11] On 13 March 2015, Dan Kaufman interviewed Delmer Berg, who at 99 years old was believed to be the last known survivor of the Abraham Lincoln Brigade.