Europe's far-right groups and ideologues have long been collaborating across national borders to further their agendas.

Immediately after Marine Le Pen successfully advanced to the second round of the French Presidential election by beating the candidate from the mainstream right, Italy's far-right leader Matteo Salvini, tweeted a photo of him with the French politician, with the caption "Go Marine". He later added: "it is time get rid of the Brussels cage!".

Dutch far-right leader Geert Wilders - known for his anti-Islam rhetoric - similarly expressed his excitement: "Congratulations sent to Marine Le Pen. A day of celebration for all Patriots in Europe. On to the 2nd round and the Presidency!"

These expressions of transnational solidarity between Europe's far-right leaders were hardly surprising. 

In the past few years a number of these far-right parties from across Europe have started "officially" coordinating strategies and in January, representatives from these movements gathered in Koblenz, Germany for a conference. The gathering prompted some observers to talk about an allegedly new "nationalist international" emerging in Europe. While the "nationalist international" appears as an oxymoron at first, international cooperation between ultra-nationalists has a long history.

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