The United Kingdom had the biggest navy in the world and so in accord with Wilhelm II’s enthusiasm for an expanded German navy, and his own strong desires, Grand Admiral Alfred von Tirpitz, Secretary of State of the German Imperial Naval Office, championed four Fleet Acts between 1898 and 1912 to greatly expand the German High Seas Fleet. The German aim was to build a fleet that would be 2/3 the size of the British navy. This plan was sparked by the threat of the British Foreign Office in March 1897, after the British invasion of Transvaal that started the Boer War, to blockade the German coast and thereby cripple the German economy, if Germany would intervene in the conflict in Transvaal. From 1905 on the British navy developed plans for such a blockade that was a central part of British