The Cadre first appeared in Justice League of America #235 (February 1985) and were created by Gerry Conway and Chuck Patton.

[1] A cosmic alien villain known as the Overmaster began to test humanity's fitness to inhabit Earth.

Years later, he returned, acting through heralds such as the Aryan Brigade, the New Extremists, and the Cadre of the Immortal.

He then announced his intention to destroy the Earth in one week, erasing Central City from the planet and stopping all deaths and births across the globe as proof of his power.

Another version of the Cadre was formed with various members of minor DC villain groups such as the Extremists.