Finland built 124 miles of border fencing after Russia allegedly weaponized migration as hybrid warfare against the Nordic NATO member state.
https://www.foxnews.com/world/finnish-foreign-ministry-official-details-russia-hybrid-warfare-reshaped-border-security
https://www.foxnews.com/world/finnish-foreign-ministry-official-details-russia-hybrid-warfare-reshaped-border-security