NATO
How Estonia is strengthening its defences
Russia perceives the Baltic states as the most vulnerable area within Nato, says a recent report from the Estonian Foreign Intelligence Service.
It said in the event of a Nato-Russia conflict, it is probable that it would happen on Nato's eastern flank.
Estonia has recently announced it will increase army numbers by a third and increase defence spending to 3.2% of GDP.
In the video above, Forces News reporter Rosie Laydon reports from Tallinn on how the country has been dealing with the heightened threat to its security.