NATO troops landed in Finland for the first time as part of the Alliance’s Baltic Operations (BALTOP) naval exercises, Yle reported.
The exercises began on Monday near Hanko west of Helsinki.
The aim of the training is to develop cooperation between the navies of NATO member states and partners.
British, German, and Italian soldiers are participating, as well as 200 US Marines.
BALTOPS are Baltic Sea exercises that have been held annually since 1972.