That is, you may use force to the extent you reasonably believe necessary to prevent a felony, riot, or serious breach of the peace. (law.stackexchange.com)
«We want you to use your good office to caution the people of Oze to desist forthwith from acts that will likely cause breach of peace and threat to security of Anambra state.» (dailypost.ng)
Members of the English Defence League (EDL) who had been set to challenge a poppy - burning have been arrested for breach of the peace. (politics.co.uk)