A Soviet border provocation on 7 June 1968, together with the invasion of Czechoslovakia that year and a general increase in Soviet military activity on the Norwegian border, contributed to a large increase in the funding for the Norwegian military presence on the border. Yet the Russia–Norway border is the only one of Russia's borders where an open war between the two bordering countries has not taken place. (there was a war between the Soviet Union and German controlled Norway which much affected this area)