History of the North Sea great herring fishing industry resulting in Scotland becoming a European leader in that industry. During the First Schleswig War (1848–51), the Crimean War (1854–56) and the Second Schleswig War (1864), belligerents took steps to reduce or eliminate commerce in the North Sea by their enemies. In the first Schleswig War, Denmark was able to halt maritime commerce by Germany in the North Sea and in the second, imposed tolls on ships crossing through the Danish straits between the Baltic and North Seas. The Crimean War saw British and French expeditions sent into the Baltic to prevent Russian ships' egress into
History of the west coast of North America economy also benefited the region as the ability to trade across the Pacific continued to show its great potential. However, only a few decades later, Japan would become a major threat. During World War II, there were few attacks against North America, but the occasional Japanese submarine lurked off the shores. Japan tried to damage the region by sending over thousands of Fu-Go balloon bombs in an attempt to light forest fires. These were generally ineffective; a few landed in either Canada or the United States but they caused no great destruction. More destructive was the internment of ethnic Japanese,