They should have 100,000 people in their National Guard. All civilians but in the event of the Russian invasion, they can call them up. That's what they may have to do if they want to keep their freedom.
The whole Latvia Armed forces, for example is 17,000 regular personnel and 35,000 reservists.
Latvia is the most obvious Baltic invasion route.
Army Group North came the other way thru Latvia in 1941.
They should have 100,000 people in their National Guard. All civilians but in the event of the Russian invasion, they can call them up. That's what they may have to do if they want to keep their freedom.