About the french "surge" the first part of the answer is here :
France to send more troops
Little surge, as you can see.
And the 700 French won't go in the Canadian sector. They will go in another less dangerous one, and this will free some US troops. And these US troops will help the Canadians.
In this situation, "take the lead"... No comment.
(Take the command in Kabul, yes, it was planed.)