Corbyn does not consider himself an absolute pacifist and has named the Spanish Civil War, the British naval blockade to stop the slave trade in the 19th century and the role of UN peacekeepers in the 1999 crisis in East Timor as justified conflicts.[270] However, opposing violence and war has been "the whole purpose of his life".[271] He prominently opposed the invasion of Iraq and war in Afghanistan, NATO-led military intervention in Libya,[272] military strikes against Assad's Syria, and military action against ISIS, and served as the chair of the Stop The War Coalition.[273] When challenged on whether there were any circumstances in which he would deploy military forces overseas he said "I'm sure there are some but I can't think of them at the moment."[273] He has called for Tony Blair to be investigated for alleged war crimes during the Iraq War.[274]