On April 14, Jerome miners dressed for work and gathered at the shaft head, but refused to enter the mine. Blankenhorn, in his history of the strike, wrote, "The super began a conciliatory speech of promises of good treatment, 'What's the good of that? We've heard that bull for ten years,' cried Gregory...'If you don't go to work, I'll shut down this mine till the grass grows over the drift mouth,' super responded...A boy miner, DiGiancomo, shouted back, 'I'll eat that grass before I'll scab." And the strike was on. The men marched through Jerome, with an accordion player in the lead, to a mass-rally that was still going strong when union organizers arrived around noontime. The mine owners were thunderstruck; never before had they been hit by a successful universal rebellion against their rule. The Jerome action lit the fuse; the strike spread to non-union mines in Hiyasota, Kelso, Boswell, Jenners, Listie, Acosta, Gray and elsewhere the next days; within one week a regional non-union coal work stoppage was in full force. The Jerome strike was significant in that it was among the first and the largest non-union site in the region to join in the nationwide strike called by the United Mine Workers Union, thus provided tipping-point momentum for the strike, or as Blankenhorn expressed it in his book's table of contents, "Jerome's Explosion." The 1922 strike became the largest action in United Mine Workers Union history; at its peak more than 500,000 union and non-union miners, in the bituminous and anthracite fields, had walked off their jobs.