Soldiers from one of Sweden's Ranger Battalions prepare to go out on patrol in a forest north of the town of Boden in northern Sweden on March 19, 2021, during the annual "Winter Sun" exercises, which tests members of the Swedish military's ability to operate in sub-Arctic climates. - In a snow-draped forest in northern Sweden, hundreds of soldiers in white-camouflaged uniforms built dugouts, patrolled on skis and laid mock ambushes to test their readiness to fight in Arctic environments. (Photo by Jonathan NACKSTRAND / AFP)