In the years following the end of World War II, Flemish nationalists often fell victim in anti-Nazi rallies, manifestations and riots because of their anti-Belgicism and because the entire Flemish movement was discredited by military, political and economic collaboration with the Germans during World War II.

[1] The only outlets for organised Flemish nationalism were charitable groups dedicated to war veteran care or local branches of the dominant Christian Social Party (Christelijke Volkspartij, CVV) which, whilst not avowedly nationalist, did have a significant separatist wing.

[8] The new VMO became associated with a series of attacks on immigrants, Walloons and leftists as well as the organisation of annual international neo-Nazi rallies at Diksmuide, where representatives of the League of Saint George and the National States' Rights Party were amongst those in attendance.

[9] These rallies had initially been for Flemish only but in the late 1960s the VMO began to invite other rightist groups to participate and they eventually became an important annual event in the international neo-Nazi calendar.

[11][12][13][14] Especially close to the League of Saint George, the two groups were part of a wider network that also included the Deutsche Bürgerinitiative in Germany, the NSDAP/AO in the United States and France's Fédération d'action nationale et européenne.

[17] In the seventies, VMO gained international attention by repatriating the corpses of former collaborators of World War Two to their homeland.

In Austria, a VMO commando (Operation Brevier) claimed to have dug up the corpse of the priest Cyriel Verschaeve, a leading figure of the collaboration, and buried it again in Flemish soil.