The air forces of four Nordic countries agreed to operate their fleets of around 250 fighter jets as a combined force, hoping to deter Russia by working together.

Air force commanders of Sweden, Norway, Finland and Denmark said Friday that they have signed a letter of intent to establish a unified Nordic air defense, Reuters reported.

“The ultimate goal is to be able to operate seamlessly together as one force by developing a Nordic concept for joint air operations based on already known NATO methodology,” Denmark’s air force said in a statement, per Bloomberg.

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“Our combined fleet can be compared to a large European country,” commander of the Danish air force, Major General Jan Dam, told Reuters.

Read more: yahoo