What significant event involved officers going on strike and subsequently being fired?

The Boston Police Strike of 1919 is significant because it marked one of the first major instances where police officers went on strike in the United States, leading to widespread chaos and disorder in the city. Officers responded to deteriorating working conditions, including low pay and poor hours, prompting them to demand better treatment. The strike quickly escalated, resulting in a significant loss of law enforcement presence, which allowed crime to surge in the city. In response, the Boston Mayor and the Police Commissioner dismissed the striking officers, with many being permanently replaced. This event highlighted the challenges of labor relations in police departments and set a precedent for how public safety and workers' rights could conflict.

The other events listed, while significant in their own right, do not involve a police strike followed by mass firings. They relate to different issues within policing, such as riots or labor disputes in other sectors without the same scale of direct police participation leading to dismissal.