Canada became involved in Afghanistan in 2001 in response to 9/11, as part of an international coalition against al-Qaeda and the Taliban. Canadian forces first arrived in 2002 and NATO later assumed control of security in Kabul. Canada extended its commitment beyond initial plans, redeploying troops to Kandahar in 2006. Parliament approved further extension until 2011. Though Canada reduced aid in 2010, 950 troops remained to train Afghan forces until 2014. The war resulted in tens of thousands of civilian casualties and evolved into a complex counterinsurgency effort.