An incomplete battalion of Canadian troops augmented by other NATO members. Russia- if invaded Latvia would take Riga in one day. Would not even have to fire at our troops they all would be captured before they woke up. So then what? Try the nuclear option? The Baltics would be affected by those same weapons that NATO would fire at the Russians. Why? Because they are immediate close neighbors.
The Balts want safety all they have to do is behave like neighbors should which they right now do not. They have become the groupies to a hostile alliance.
Drawing Baltics into the alliance was a monumental error which we all will come to regret. And please do not mention Ukraine. Ukraine is another example of an idiotic foreign policy decision attempting to pull it out of the Russian sphere. Crimea is the price of that error that Ukraine pays for now.
The West is affected by chronic virus called Russo-phobia. One characteristic of this virus is underestimating of  Russian capabilities.