The mutineers seized the Citadel, a Supreme Junta government took over, and on 26–28 June, Napoleon's Marshal Moncey attacked the city with a column of 9,000 French imperial troops in the First Battle of Valencia. He failed to take the city in two assaults and retreated to Madrid. Marshal Suchet began a long siege of the city in October 1811, and after intense bombardment forced it to surrender on 8 January 1812. After the capitulation, the French instituted reforms in Valencia, which became the capital of Spain when the Bonapartist pretender to the throne, José I (Joseph Bonaparte, Napoleon's elder brother), moved the Court there in the middle of 1812. The disaster of the Battle of Vitoria on 21 June 1813 obliged Suchet to quit Valencia, and the French troops withdrew in July.