Boeing in South Carolina has been accused of firing three employees for union organizing. The employees who were fired were accused of failing to report a strike to the company. Allegedly, Boeing has impeded unionization efforts by attempting to halt elections from occurring, and leading an anti-union campaign. Additionally, once the union was able to get support- Boeing decided to appeal the election results with the NRLB. In response to the appeal, Boeing has been accused of anti-union activities.
See "'It's because we were union members': Boeing fires workers who organized", Michael Sainato, The Guardian, May 3, 2019