Wikipedia
The IJzerwake (Dutch, "Yser Vigil") is an organisation that split off from the IJzerbedevaart, and unites the more radical Flemish nationalists. Each year in August, they organise a commemoration of the victims of the two World Wars, combined with a rally for Flemish independence and a more conservative government policy. Many participants are members of the political party Vlaams Belang, and some are members and sympathizers of the less radical Nieuw-Vlaamse Alliantie. Radical separatist grassroots organisations, such as Voorpost and NSV, also attend.
The annual event derives its name from the IJzer river, around which some of the fiercest and most deadly battles of the first World War were fought. It takes place in a field near Zuidschote, between the towns Diksmuide on the IJzer river, and Ieper. A monument in the field commemorates the Brothers Van Raemdonck, the Flemish soldiers who both fell there on March 26, 1917, killed by enemy fire and apparently having died in each other's arms.
The philosophical concept behind the IJzerwake is that of "Godsvrede" ( Truce of God), a medieval term referring to the unification of previously competing factions behind one common cause. This of course symbolises the meeting of the myriad of organisations in the strongly diversified Flemish Movement which the IJzerwake hopes to unite.