Passage: At the launching of the ship on 7 April 1910, Helmuth von Moltke the Younger christened her after his uncle, Helmuth von Moltke the Elder, the Chief of Staff of the Prussian Army in the mid 19th century. On 11 September 1911, a crew composed of dockyard workers transferred the ship from Hamburg to Kiel through the Skagerrak. On 30 September, the ship was commissioned, under the command of Kapitän zur See von Mann, and replaced Roon in the Reconnaissance Unit. Sea trials continued until 1 April 1912.Moltke was the only German capital ship to ever visit the United States. On 11 May 1912 she left Kiel, accompanied by the light cruisers Stettin and Bremen, and arrived off Hampton Roads, Virginia, on 30 May 1912. After touring the East Coast for two weeks, she returned to Kiel on 24 June.In July 1912, Moltke escorted Kaiser Wilhelm II's yacht to Russia. Upon returning, Moltke's commander was replaced by KzS Magnus von Levetzow, and the ship became the Reconnaissance Force flagship until 23 June 1914, when the commander's flag was transferred to the new battlecruiser Seydlitz. There was some consideration given to deploying Moltke to the Far East in order to replace the armored cruiser Scharnhorst, but the plan was abandoned when it became apparent that Goeben needed replacement in the Mediterranean. Moltke was then scheduled to transfer to replace her sister ship, but this plan was interrupted by the outbreak of World War I.

Question: What war was Moltke's plan interrupted by?
World War I