Paratroopers are specially trained soldiers that make use of parachutes to commonly land in areas that are not accessible by ground forces or are behind enemy lines. Both the Axis and the Allis used paratroopers in numerous operations throughout the war. Although the first paratrooper units were from the Soviet Union, German airborne units or Fallschirmjäger troops were the first to invade another country. This operation was itself part of Operation Weserübung.