National Review
Victor Davis Hanson
Oct. 18, 2017
Over 2,400 years ago, the historian Thucydides had emphasized the military advantages of sea powers, particularly their ability to control commerce and move troops. Not much had changed since antiquity, as the oceans likewise mattered a great deal to the six major belligerents in World War II. Three great powers were invaded during the war: Germany, Italy, and Russia. Three were not: America, Britain, and Japan. All the former were on the European landmass, the latter were either islands or distant and bounded by two vast oceans. Amphibious operations originating on the high seas were a far more difficult matter than crossing borders, or in the case of Italy, crossing from Sicily onto the mainland. The protection afforded Great Britain and the United States by surrounding seas meant that containing the German threat was never the existential challenge for them that it always was for the Western Europeans. The generals of the French may have always appeared cranky to the Anglo-Americans, but then, neither Britain nor America had a common border with Germany. The only way for Germany to strike Britain was to invade and occupy the French and Belgian coasts, as reflected both in the German Septemberprogramm of 1914 and in Hitler’s obsessions with the Atlantic ports between 1940 and 1945. Since the 15th century, European countries that faced the Atlantic had natural advantages over those whose chief home ports were confined to the North, Baltic, and Mediterranean Seas.
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http://www.nationalreview.com/article/452605/victor-davis-hanson-second-world-wars-excerpt-mutual-misunderstanding-deadly-cost
