Read this: Land Forces during this period also deployed in support of peacekeeping operations within United Nations sanctioned conflicts. The nature of the Canadian Forces has continued to evolve. They have been deployed in Afghanistan until 2011, under the NATO-led United Nations International Security Assistance Force (ISAF), at the request of the Government of Afghanistan.

Who requested the aid of the Canadians?
What is the answer? (If it cannot be answered, return "unanswerable")
the Government of Afghanistan