The battalion fought alongside the Abraham Lincoln Battalion at Brunete in July 1937. Casualties were so high (around 50 per cent) that on 14th July the two units were merged.
The dead sleep cold in Spain tonight. Snow blows through the olive groves, sifting against the tree roots. Snow drifts over the mounds with small headboards. For our dead are a part of the earth of Spain now and the earth of Spain can never die. Each winter it will seem to die and each spring it will come alive again. Our dead will live with it forever.
Over 40,000 volunteers from 52 countries flocked to Spain between 1936 and 1939 to take part in the historic struggle between democracy and fascism known as the Spanish Civil War.
Five brigades of international volunteers fought on behalf of the democratically elected Republican (or Loyalist) government. Most of the North American volunteers served in the unit known as the 15th brigade, which included the Abraham Lincoln battalion, the George Washington battalion and the (largely Canadian) Mackenzie-Papineau battalion. All told, about 2,800 Americans, 1,250 Canadians and 800 Cubans served in the International Brigades. Over 80 of the U.S. volunteers were African-American. In fact, the Lincoln Battalion was headed by Oliver Law, an African-American from Chicago, until he died in battle.