evidence: A chronic issue affecting French Guiana is the influx of illegal immigrants and clandestine gold prospectors from Brazil and Suriname. The border between the department and Suriname, the Maroni River, flows through rain forest and is difficult for the Gendarmerie and the French Foreign Legion to patrol. There have been several phases launched by the French government to combat illegal gold mining in French Guiana, beginning with Operation Anaconda beginning in 2003, followed by Operation Harpie in 2008 and 2009 and Operation Harpie Reinforce in 2010. Colonel François Müller, the commander of French Guiana's gendarmes, believes these operations have been successful. However, after each operation ends, Brazilian miners, garimpeiros [fr], return.[69] Soon after Operation Harpie Reinforce began, an altercation took place between French authorities and Brazilian miners. On 12 March 2010 a team of French soldiers and border police were attacked while returning from a successful operation, during which "the soldiers had arrested 15 miners, confiscated three boats, and seized 617 grams of gold... currently worth about $22,317". Garimpeiros returned to retrieve their lost loot and colleagues.