i like to present the the typhon pact insignia with signs of all six members of this pact.
the insignia is described in the TNG novel "A Singular Destiny", the sequel of the Destiny trilogy. the typhon pact became the main opponent of the federation after the surprising end of the borg threat in the novel timeline.
the typhon pact consist of the the romulan star empire, tzenkethi coalition, breen confederacy, gorn hegemony, tholian assembly and the holy order of the kinshaya, all of which had hostile relations with the federation and/or klingon empire in their previous history and all of which had typically previously maintained xenophobic and isolationist policies.
enjoy!