For 10 points, name this emperor of Germany through World War I.
During this man's reign, the SPD adopted the Erfurt (AIR-foort) Program, by which it would participate in German politics. This man angered France and Britain by sending the Panther to the port of Agadir (AG-uh-deer), precipitating the Second Moroccan Crisis. Paul von Hindenburg and Erich Ludendorff (LOO-den-dorf) exercised power during the end of this man's rule, which saw the use of the Schlieffen (SHLEEF-en) Plan. For 10 points, name this emperor of Germany through World War I.
During this man's reign, the SPD adopted the Erfurt (AIR-foort) Program, by which it would participate in German politics.
{Wilhelm II} [or {William II}; prompt on {Wilhelm}; prompt on {William}]