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In the 19th-century classic, The Influence of Sea Power Upon History, Alfred Thayer Mahan argued the paramount importance of naval superiority in peace and war. Trade by sea was always important in providing raw materials as well as luxuries, but only rarely was it protected by an established navy.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.