 
 <prompt> Wetin be di popular German state wey start for 1525, but end for 1918? Based on di question wey dey before dis one, write something wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: The main reason wey cause the war na because of the candidacy of Leopold of Hohenzollern-Sigmaringen, wey be Prussian prince, to become king of Spain. France dey fear say dem go surround dem with alliance between Prussia and Spain. The Hohenzollern prince candidacy later comot based on French pressure, but Otto von Bismarck provoke the French make dem declare war by changing telegram wey William I send. Bismarck come release the Ems Dispatch to the public, and make am look like say the king treat the French envoy anyhow, wey come make French people vex well well. 