[2] It was a reaction to France's Nuclear Strike Force.
[2] In 1971, he exhibited posters depicting scenes from the Commune.
[5] In 1996, he initiated the collection of international artwork called Art Against Apartheid alongside Antonio Saura.
[6] Pignon-Ernest's posters are in the collection of the Center for the Study of Political Graphics.
[8] With Henri Cueco, he co-founded the Syndicat national des artistes plasticiens CGT.