Alfred von Tirpitz
Mahan was initially introduced to the German navy by the strategist Ludwig Borckenhagen, in a series of influential papers. Subsequently, his name became a household word in the German navy, as Kaiser Wilhelm II ordered his officers to read Mahan, and Admiral Alfred von Tirpitz (1849–1930) used Mahan's reputation to build a powerful surface fleet. Mahan's ideas decisively shaped Japanese naval doctrine, especially in the fleet actions of World War II.