National Labor Relations Board attorneys are pursuing charges against Walmart, claiming the nonunion retail giant illegally fired 19 workers for participating in activities related to anti-Walmart protests in 14 states held over the last year and a half. More than 60 Walmart managers and one corporate officer, David Tovar, Walmart’s vice president for communications, are named in the complaint.

NLRB attorneys first authorized charges last November in relation to various protest events but held off on filing them in an effort to give Walmart and the complainants a chance to settle. The federal agency said that the discussions “were not successful” and consolidated the charges into a single case Monday.