It's always difficult to read tea leaves, and parse what the government really means when it says Canada will no longer have a "combat role" after 2011 in Kandahar. I'm not sure they know what they really mean. It is, however, a position that now enjoys overwhelming popular and political support. The question is, if we were respondent to American or NATO pressure to continue on in some capacity anyway, what options now remain open with that? Would a continued presence of a Canadian Provincial Reconstruction Team still be open for debate? (Probably.) Would the use of helicopters in transport roles be? (Possibly.)
How about continuing ANSF mentoring? Maybe not so much.
It's not just that mentors, with their ANSF partners, are in combat as much as, if not more than the regular battalion troops in the same province, making their "non-combat" designation pretty much a joke. Nor is it that they have to follow the same Western-level force protection standards in their defended locations and vehicles. When you're a 4-man team working a platoon house with 30 dependable ANA or ANP, there's no margin for error there. And it's not just that they'd necessarily have to sponge off the nearest main force battalion for all kinds of things (a logistical train, to start with).
No, it's also that, assuming the Canadian battle group in Kandahar does leave, it will be replaced by another nationality. Almost certainly, in this case, an American battalion. Well, the whole point of Canadian mentors most days is not to teach cute little lectures, it's to achieve synchronization of effects through liaison. Which means explaining the Canadian military to Afghans and the Afghan military to Canadians, and working out all the differences that come with that.
Hey, we're as close to Americans as you can get, I guess, without being American, but it's an open question whether an American battle group commander is really going to achieve maximal value by having soldiers of a third nation, any third nation, as his interface between him and the local ANSF, rather than an American ETT or PMT. A Canadian OMLT might be somewhat better that way than a Romanian one, I suppose, but it isn't the best possible solution for getting that hard seal on the intent side that, if I were a U.S. battalion commander, I would want to have. No, once you remove the Canadian battle group you're there to interface with (and that the Afghans and you are depending on to stay alive) the need for corresponding mentoring teams from the same nationality definitely diminishes.
This is even more strongly the case if you're talking the brigade level, where I worked. I may know something now about Canadian and ANA brigade-level staff procedures, but my knowledge of American brigade-level procedures, in practice, is fairly limited. So why exactly would I be the right person to explain them to Afghans? (Never mind that before Afghanistan, Canada hadn't had a brigade deployed in combat since the Korean War, so maybe we're not the best people to explain brigade procedures to anyone.)
Now, we have a lot of mentoring experience with the ANA as an army, and if you'd like to take advantage of that, possibly with a reduced mentor component (say 30-60 soldiers with previous tour experience) imbedded in a mixed-force structure under overall U.S. leadership (as augmentees, for instance), well, that makes a lot more sense. But having the only way Afghans can talk to Americans being through both an interpreter AND a Canadian in either direction would not seem optimal, and keeping over 200 Canadian soldiers in a mentoring role in Kandahar Province past 2011 not the best application of our limited resources, sorry to say.