Interesting that in discussing the situation in caucus Cunliffe first mentioned peace, but then referred to detente.
If detente is the word we are talking a relaxation of tension, reduction in hostilities, such as the period in US/Soviet relations, prior to cessation of the Cold War.
Both sides remained ready to re-commence hostility, peace was not the state of play, but co-existence was. Cunliffe presumably chose his words carefully, it implies that a real peace has yet to exist. Tolerance of each other might be closer to the truth.