High Quality Content by WIKIPEDIA articles! Breach of the peace is a legal term used in constitutional law in English-speaking countries, and in a wider public order sense in Britain.In the United States, the Speech or Debate Clause of Article One of the United States Constitution provides that members of Congress shall be immune from arrest in going to and departing from sessions and while Congress is in session except for cases of "Treason, Felony, and Breach of the Peace.The first two are somewhat self-explanatory; it has been suggested that the third is deliberately somewhat vague. The doctrine thus established is called congressional immunity; it arose out of the necessity to prevent a vengeful executive from arresting members of the legislature as a pretext to prevent them from taking actions that the executive might find to be displeasing.