Well this is a surprise:
Estonian online daily, Postimees Online, has reported Germany will send rotating infantry troops to Estonia in 2016....Speaking to Postimees Online, the head of Germany’s defence committee, Hans-Peter Bartels, said: “Basically, a rotating company will be sent to three Eastern European countries for a few months, maybe for three months, to take part in exercises.”
Link:http://www.baltictimes.com/germany_w...aly5YU.twitter

Now if others followed this example that should alter Putin's calculus IMHO. IIRC of NATO's twenty-eight members only one has no military, Iceland. So twenty-seven companies divided by three Baltic states, nine companies on rotation would easily manage short tours.