Canada would send their entire navy of 3 ships and air for...Wait do they even have an air force?
You're in the ballpark on the Navy. They don't even have resupply ships right now, because the last one left got lit on fire and had to be towed to Hawaii by the US Navy. The Conservative government announced a big ship building program about 5+ years ago now, for something like 25-30 billion. It was supposed to provide a fair number of new frigates/destroyers, a couple new supply ships, and a bunch of new coastal defense and Arctic patrol ships. At this point, it's a complete fucking tire fire because believe it or not, Canadian military procurement is significantly WORSE than it is in the US. And the whole program was also an economic program as well, to help support ship yards on both coasts.
National Shipbuilding Procurement Strategy - Wikipedia
Apparently some of the Nordic nations are actually building frigates for the price that the shipyards are charging just to design one. Which is hilarious. At this point the program is in a death spiral where the number of ships it will produce keeps going down, or the overall cost keeps going up. It's a fucking joke. Similar problems have happened with the procurement of the Sea King replacement, which has been going on since I was in elementary school (1983, to be precise):
Canadian Sea King replacement - Wikipedia
As far as the Air Force goes, we've got 100+ ancient CF-18's, only two thirds of which are air worthy at any one time. A bunch of ancient C-130's, and a handful of relatively new C-17's (that procurement went well, because they were just bought off the shelf. Thanks Boeing!). The CF-18's are supposed to be replaced with F-35's, but that's all up in the air right now, and the Liberal government is doing everything it can to back up Trudeau's rhetoric about not buying them. But there's probably no other realistic option out there, other than maybe Super Hornet's, which apparently aren't going to be much cheaper anyways.
Canada was a baller in WWII and they started re-funding their military thanks to Afghanistan. At this point they could probably conquer Europe...
Canada really did kick ass in WWII, relative to it's size. It was impressive how the country mobilized and didn't, you know, wait a year or two to join in the fun. I think at one point it had the 4th largest Navy in the world by tonnage, or maybe just number of vessels. That shit is all in the distant past, though. We barely spend 1% of GDP on the military. NATO members are supposed to spend 2%, even if only a few do. Some aspects of the military are top notch, but in terms of the big ticket items that you'd wage an actual war against another nation state with, we've get next to nothing that isn't left over from the Cold War. It's a serious problem, in my opinion, especially with the melting Arctic and having basically no military presence up there other than a bunch of Inuit "rangers" with 100 year old rifles. Even compared to similarly sized countries population or economy wise, Canada's military is kind of a joke these days. And it's not likely to change any time soon.