Dozens of soldiers who refused to attend a Christian band’s concert at Fort Eustis said they were banished to their barracks and told to clean them up, and the Pentagon said Friday that it was investigating the accusation. Pvt. Anthony Smith said he and other soldiers felt pressured to attend the May concert by the Christian rock group BarlowGirl as part of the “Commanding General’s Spiritual Fitness Concerts.” Private Smith said 80 men decided not to attend. “Instead of being released to our personal time,” he said, “we were locked down. It seemed very much like a punishment.” The Military Religious Freedom Foundation said it had been approached by soldiers who said they were punished for not attending the event.