About 250 foreign volunteers fought for the Carlists; the majority were French monarchists, but they were joined by men from Portugal, Britain, Belgium, Piedmont, and the German states. Friedrich, Prince of Schwarzenberg fought for the Carlists, and had taken part in the French conquest of Algeria and the Swiss civil war of the Sonderbund. The Carlists' ranks included such men as Prince Felix Lichnowsky, Adolfo Loning, Baron Wilhelm Von Radhen and August Karl von Goeben, all of whom later wrote memoirs concerning the war.