AN interesting obituary appeared in The New York Times recently, though the death of its subject last month was largely unnoticed beyond his family and friends.

That’s not surprising. Delmer Berg wasn’t a celebrity. He wasn’t someone with great wealth or influence. He had never held public office. He was a Californian. He worked as a farmhand and stonemason. He did some union organizing. He was vice president of his local N.A.A.C.P. chapter. He protested against the Vietnam War and nuclear weapons. He joined the United States Communist Party in 1943, and, according to The Times, he remained an “unreconstructed Communist” for the rest of his life. He was 100.

He was also the last known living veteran of the Abraham Lincoln Brigade.

Not many Americans younger than 70 know much about the Lincoln Brigade. It became the designation given to the nearly 3,000 mostly American volunteers who fought in the Spanish Civil War in 1937 and 1938. They fought on the Republican side, in defense of the democratically elected leftist government of Spain, and against the Nationalists, the military rebels led by Gen. Francisco Franco.

The Nationalists claimed their cause was anti-Communism and the restoration of the monarchy, and the Republicans professed to fight for the preservation of democracy. Fascists led the former, while Communists, both the cynical and naïve varieties, sought control of the latter. And into the Republican camp came idealistic freedom fighters from abroad.