The World Trade centre was hit on September 11 2001. On October 8, 2001, Canada deployed a 4 ship task force to the Persion Gulf to work with the US naval deployment. Since then, Canadian frigates and destroyers have been rotating into the Gulf.
In February 2002, Canada deployed light infantry and cavalry (3 Princess Patricia's Canadian Light Infantry together with squadrons of Lord Strathcona Horse (Royal Canadian) to Kandahar to work with the 101st and other US units. You may recall the fratricice incident that took place at Tarnak Farm near Kandahar in September 2002. You may also recall that it was a Canadian sniper who set a record when he took out a Taliban at a distance of almost 2.5 klicks. Canada has been rotating infantry and cavalry to Afghanistan since then.
Canada was with you on the Afghanistan job effectively from the beginning, just as we were with you in the Kosovo job.
Our then Prime Minister refused to join you in the Iraq job, a decision withe which I disagree, and he was particularly offensive in the manner in which he declined. However, every nation has to make its own geopolicital decisions. That Liberal PM is no longer in charge, nor is his Liberal successor, and Canada now has a Conservative PN.
You might also note that your own military seems to have a different opinion than you on whether or not our infantry ha "eak - knees", judging by the fact that the US has been awarding Bronze Stars an Bronze Stars with V device to Canadian soldiers.
It's beginning to look like each PRT in hostile territory is going to have most of a brigade in support.