Yes, here in Denmark we are used to long lasting wars, not just The Whisky War and the Rockall Dispute.
On 11 November 1809 Andalusia in southern Spain declared war on Denmark due to Denmark's stupid support of Napoleon. Now late autumn isn't a good time to go to war in northern Europe, you could easily get cold feet, so hostilities had to wait until springtime. And besides, the Spanish Armada had no icebreakers back in 1809.
However, when springtime 1810 arrived, then somehow Andalusia must have forgotten that they were at war against Denmark. Or maybe military resources were needed elsewhere? In any case, cyber war had not been invented yet.
Finally on 11 November 1981 the Danish ambassador in Spain Mr. Mogens Wandel-Petersen went to Sevilla and signed a peace treaty. Witnesses were - in addition to the locals - a couple hundred Danish tourists, many of them clothed as viking warriors. They celebrated the end of an exactly 172 years long war singing the Danish and Spanish national anthems while both national flags were raised at the town hall.
Always keep your number of landings equal to your number of take-offs