The West Virginia Coal Wars of the ’20s culminated in the Battle of Blair Mountain, in which 10,000 striking miners confronted a force of union-busters; though the largest armed uprising in the U.S. since the Civil War, the bloody skirmish remains little-known, remembered more in local ballads than history books. The 75th anniversary of the miners’ struggle will be observed in “Labor History in Song and Story,” a two-day event featuring mountain singer and writer David Morris in a performance of work and protest songs. Tonight, Morris will be joined by so-called “troubadour of labor” Joe Glazer, whose “Too Old to Work” became an anthem for striking Chrysler workers in 1950. On Sunday, Larry Austin lectures on the coal wars and the Battle of Blair Mountain, the only time that U.S. warplanes and bombers were dispatched on a mission against American citizens. Concert: at 7:30 p.m. tonight. $6. Lecture: 10 a.m. on Sunday. FREE. At Mt. Vernon Unitarian Church, 1909 Windmill Lane, Alexandria. (703) 765-5950. (Eddie Dean)