What is Task Force Kandahar?

That is the Canadian-led formation that is the heart of our mission, Joint Task Force Afghanistan. Note its composition (as well as that of the mission overall at preceding link):

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Task Force Kandahar is the formation conducting the ISAF mission in Kandahar Province under ISAF Regional Command (South). It comprises an Operational Mentor and Liaison Team (OMLT), a Provincial Reconstruction Team (PRT) and two manoeuvre units: the 2nd Battalion, Royal 22e Regiment (2 R22eR) Battle Group, and the 2nd Battalion of the 2nd Regiment [this link added to original - MC], 1st Infantry Division (2–2 Infantry) of the United States Army [emphasis added]...