In June 1941, he was a founding member of the "Army of Enslaved Victors" (Στρατιά Σκλαβωμένων Νικητών, SSN), one of the first resistance groups to spring up after Greece was overrun by the Germans in April 1941.

However, Perrikos was dissatisfied by the SSN's neutrality on the crucial issue of the post-war regime (monarchy or republic), and together with a number of others, split off to form the PEAN.

[1] Politically, PEAN, like most other similar groups formed in that period, was leftist-socialist, advocating "social justice" and state takeover of crucial sectors of the industry, while being vehemently opposed to any return of the monarchy in the person of King George II.

Its most notable achievements, however, are the two bombings carried out by its "destruction squad" (members: Dionysios Papadopoulos, Thanasis Skouras, Antonis Mytilinaios, Spyros Galatis, Dimitrios Lois, Ioulia Bimba).

[4] The attack was widely publicized and praised by Allied radio stations, and marked the end of the ESPO and of German attempts to recruit Greeks into the Wehrmacht.

In September 1943, PEAN, the Athenian wing of EDES and the Sacred Brigade formed the People's Liberation Union (LAE) an alliance of Venizelist resistance organizations.