Jeusset later joined with fellow nationalist extremists Gwilherm Berthou and Célestin Lainé to found Kentoc'h Mervel (Sooner Death), a group dedicated to direct action.

Lainé, however, insisted that a more tightly organized group was necessary, going on to create the terrorist cell Gwenn ha du.

[1] After Gwenn ha du performed its first violent act, blowing up a sculpture, Jeusset was one of six nationalist militants who were arrested and detained.

It is easy to invoke military explanations for this carnage, but that does not alter the fact the actual organizer of troop dispositions was the Jew Abrahami, born... in the ghetto of Constantinople.

During World War II Jeusset broke away from Mordrel to create his own party once more, the Breton Social-National Workers' Movement, but he was unable to obtain many followers.