London Guardian 
April 3, 2013
Hundreds of Europeans have travelled to Syria since the start of the civil war to fight against the country’s president, Bashar al-Assad, the most comprehensive study of European foreign fighters to date has found.
A year-long survey by King’s College London of more than two hundred martyrdom posts on jihadist-linked websites and hundreds of Arab and western press reports found that up to 600 individuals from 14 countries including the UK, Austria, Spain, Sweden and Germany had taken part in the conflict since it began in 2011.
The largest contingent, the study found, came from the UK, with estimates of fighters running between 28 and 134.
Based on their populations, the figures for Belgium, the Netherlands and Ireland, with about 200 fighters between them, made these countries the most significant, the lead researcher, Prof Peter Neumann from the International Centre for the Study of Radicalisation  (ICSR) at King’s College, said.